Question

Use substitution to solve each system of equations.

4x – 5y = –7
y = 5x

Answer 1

Refer to answers in the picture.

Answer 2

4x - 5(5x)= -7
4x - 25x = -7
-21x = -7
x = 1/3

y = 5(1/3)
y = 5/3