Math Problem Statement

Felicia has the following system of equations on her math homework.

3x−5y=22 y= ‒5x+32

What is the value of x in the solution to this system of equations?

Solution

We are given the following system of equations:

  1. 3x5y=223x - 5y = 22
  2. y=5x+32y = -5x + 32

To find the value of xx, we can use substitution since the second equation already expresses yy in terms of xx.

Step 1: Substitute y=5x+32y = -5x + 32 into the first equation.

3x5(5x+32)=223x - 5(-5x + 32) = 22

Step 2: Distribute the 5-5 across the terms inside the parentheses.

3x+25x160=223x + 25x - 160 = 22

Step 3: Combine like terms.

28x160=2228x - 160 = 22

Step 4: Add 160 to both sides to isolate the xx-term.

28x=18228x = 182

Step 5: Solve for xx by dividing both sides by 28.

x=18228=6.5x = \frac{182}{28} = 6.5

So, the value of xx is 6.5\boxed{6.5}.

Would you like to see how to find the corresponding value of yy, or do you have any other questions?

Related Questions:

  1. How do we solve for yy in this system?
  2. How can you verify the solution for both xx and yy?
  3. Can you solve this system using the elimination method?
  4. How do you graphically represent the solution of this system of equations?
  5. What if the second equation were y=5x32y = 5x - 32, how would the solution change?

Tip: Substitution works best when one of the equations is already solved for one variable, making it easier to substitute and simplify.

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Math Problem Analysis

Mathematical Concepts

Algebra
Systems of Linear Equations
Substitution Method

Formulas

y = -5x + 32
3x - 5y = 22

Theorems

Substitution Method

Suitable Grade Level

Grades 8-10