Question

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

4x + 2y = 12

x - y = 3

Answer 1

x=3

Answer 2

From the second equation:
\[x=y+3\]
Substitute in the first and solve for y and then x
\[4(y+3)+2y=12 \]
\[4y+12+2y=12; 6y=0; y=0; x=3\]