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 + 3 = 2x
You have to isolate y. Subtract 3 on both sides.
y = 2x - 3

Now plug y into 2x + y = 5.
2x + (2x - 3) = 5

Answer 2

thanks

Answer 3

your welcome :)