Question

Use the Substitution method to solve the system of equations.

x + y = 20
30x + 25y = 550

Answer 1

First turn one of the equations into slope-intercept form by (I would suggest the first one) and then plug in what you get for y into the other equation and solve for x

Answer 2

x + y = 20
y=-x+20

30x + 25(-x+20)= 550
30x-25x+500=550
5x+500=550

Answer 3

thank you.

Answer 4

anytime :)