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


2x + 2x - 3 = 5

2x + 3 - 2x = 5

2x + 2x + 3 = 5

Answer 1

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

Answer 2

so c?

Answer 3

a. because
2(2)+2(2)-3=5
4+4-3=5
5=5

Answer 4

thank you!