Question

Choose one of the equations with both variables, substitute -4 for y, and find the value of x. What is the value of x ?

Answer 1

To solve for x when y is substituted as -4, we used the linear equation 7y = 6x + 8. After substitution and simplification, we found that x = -6.

Step-by-step explanation:

To find the value of x when y is substituted as -4, we need to choose one of the given linear equations and solve for x. Let us take the equation 7y = 6x + 8, which is a linear equation. Substituting y = -4 we get:

7(-4) = 6x + 8

Now we solve for x as follows:

• Multiply 7 by -4 to get -28.
• Subtract 8 from both sides to isolate the term with x on one side: -28 - 8 = 6x.
• Simplify the left side to get -36 = 6x.
• Divide both sides by 6 to solve for x: x = -36 / 6.
• Therefore, x = -6.