Question

For the following system, use the second equation to make a substitution for y in the first equation.

2x + y = 5
y + 3 = 2x

Answer 1

y = 2x-3
-> 2x + (2x-3) = 5
4x -3 = 5
4x = 8
x = 2

y = 2(2) -3
y = 4-3
y= 1