Expressing (3y+2)/(2y+2) In Terms Of M A Step By Step Guide

by Viktoria Ivanova 60 views

Hey everyone! Today, we're going to dive into an exciting algebra problem where we'll express a fraction involving y in terms of m, given that y is defined in terms of m. This is a classic example of algebraic manipulation, and it's super useful for solidifying your skills in substitution and simplification. So, let's get started!

Problem Statement: The Challenge

The problem we're tackling is this: Given that $y = \frac{2m + 3}{2m - 3}$, we need to express $\frac{3y + 2}{2y + 2}$ in terms of m. Essentially, we're going to replace y in the second expression with its equivalent expression in terms of m and then simplify the resulting fraction. This involves a few key steps: substitution, finding a common denominator, combining like terms, and hopefully, some simplification.

Understanding the Goal

Before we jump into the solution, let's make sure we understand what we're trying to achieve. We have an expression that involves y, but we want to rewrite it so that it only involves m. This means we need to get rid of y completely and have an expression that looks something like $\frac{\text{some expression with } m}{\text{another expression with } m}$. Once we have this, we'll simplify it as much as possible. Think of it as a puzzle where we're swapping out one variable for another and then tidying up the result.

Why This Matters

You might be wondering, "Why bother with this kind of problem?" Well, algebraic manipulation like this is fundamental in many areas of mathematics and its applications. Whether you're solving equations, working with functions, or even dealing with calculus, the ability to substitute and simplify expressions is crucial. Plus, it's a great workout for your algebraic muscles!

Step-by-Step Solution: Cracking the Code

Now, let's walk through the solution step by step. I'll break it down into manageable chunks, so it's easy to follow along. Remember, the key here is to be organized and patient. Algebra is like a delicate dance โ€“ each step needs to be precise, or you might stumble.

Step 1: Substitution - The Initial Swap

The first thing we need to do is substitute the expression for y into the fraction we want to simplify. So, wherever we see y in $\frac{3y + 2}{2y + 2}$, we're going to replace it with $ rac{2m + 3}{2m - 3}$. This gives us:

3(2m+32mโˆ’3)+22(2m+32mโˆ’3)+2\frac{3(\frac{2m + 3}{2m - 3}) + 2}{2(\frac{2m + 3}{2m - 3}) + 2}

Okay, it looks a bit messy, I know. But don't worry, we're going to clean it up. The important thing is we've successfully made the substitution. We've replaced y with its equivalent expression in terms of m. This is a major step forward.

Step 2: Eliminating Inner Fractions - Clearing the Clutter

Our next goal is to get rid of those fractions within the bigger fraction. To do this, we'll multiply both the numerator and the denominator of the entire fraction by the common denominator of the inner fractions, which is (2m - 3). This might sound complicated, but it's a standard trick to simplify complex fractions. Let's do it:

[3(2m+32mโˆ’3)+2](2mโˆ’3)[2(2m+32mโˆ’3)+2](2mโˆ’3)\frac{[3(\frac{2m + 3}{2m - 3}) + 2](2m - 3)}{[2(\frac{2m + 3}{2m - 3}) + 2](2m - 3)}

Now, we distribute (2m - 3) in both the numerator and the denominator. This will cancel out the denominators of the inner fractions:

3(2m+3)+2(2mโˆ’3)2(2m+3)+2(2mโˆ’3)\frac{3(2m + 3) + 2(2m - 3)}{2(2m + 3) + 2(2m - 3)}

See? Much cleaner already! We've eliminated the inner fractions, which makes the expression much easier to work with.

Step 3: Expanding and Simplifying - The Great Tidying Up

Now, we're going to expand the expressions in the numerator and the denominator by distributing the constants. This means multiplying out the terms inside the parentheses:

6m+9+4mโˆ’64m+6+4mโˆ’6\frac{6m + 9 + 4m - 6}{4m + 6 + 4m - 6}

Next, we combine like terms in both the numerator and the denominator. This is where we add together the terms with m and the constant terms:

(6m+4m)+(9โˆ’6)(4m+4m)+(6โˆ’6)\frac{(6m + 4m) + (9 - 6)}{(4m + 4m) + (6 - 6)}

10m+38m\frac{10m + 3}{8m}

And there you have it! We've simplified the expression as much as possible. We've expressed $\frac{3y + 2}{2y + 2}$ in terms of m.

Final Answer: The Result of Our Efforts

So, the final answer is:

3y+22y+2=10m+38m\frac{3y + 2}{2y + 2} = \frac{10m + 3}{8m}

We started with a somewhat intimidating expression and, through careful substitution and simplification, we arrived at a much cleaner and more manageable result. This is the power of algebra, guys! We took something complex and broke it down into simpler components.

Key Takeaways: Lessons Learned

Let's recap the key steps we took to solve this problem. This will help you tackle similar problems in the future:

  1. Substitution is Key: The first and most crucial step was substituting the expression for y in terms of m. This is a fundamental technique in algebra.
  2. Clearing Fractions: Multiplying the numerator and denominator by a common denominator is a powerful way to eliminate inner fractions and simplify complex expressions.
  3. Expanding and Combining: Expanding expressions by distributing and then combining like terms is essential for simplifying algebraic expressions.
  4. Organization is Your Friend: Keeping your work organized and writing each step clearly helps prevent errors and makes it easier to follow your logic.

Practice Problems: Sharpening Your Skills

To really master this type of problem, practice is essential. Here are a couple of practice problems you can try:

  1. Given $x = \frac{3p - 1}{p + 2}$, express $\frac{2x + 1}{x - 3}$ in terms of p.
  2. Given $a = \frac{5q + 2}{2q - 1}$, express $\frac{4a - 3}{3a + 1}$ in terms of q.

Work through these problems using the steps we discussed, and you'll be well on your way to mastering algebraic manipulation!

Conclusion: The Beauty of Algebra

Algebraic manipulation might seem daunting at first, but with practice and a systematic approach, it becomes a powerful tool. We've seen how to take a complex expression and, through careful steps, simplify it and express it in terms of a different variable. This skill is not just for math class; it's a valuable asset in many areas of life. So, keep practicing, keep exploring, and keep enjoying the beauty of algebra!