Question

Solve the system of equations by substitution. What is the solution for x?

2x + y = 1
4x + 2y = −2

Answer 1

It wants you to use substitution so lets get the value of y and substitute it into the other equation

2x + y = 1
4x + 2y = −2


2x + y = 1
y = -2x + 1

Now that we know what y is lets use it as a substitution for y in the other equation

4x + 2(-2x+1) = −2

Can you solve for x now?