Question

Solve the system by substitution.
y = 4x
y = 8x - 36

Answer 1

(9,36)

Explanation:

Substitute the 4x for the y in second equation.

Basically setting them equal to each other because the both have 'y='

4x = 8x - 36

-4x = -36 (subtract 8x from both sides)

x = 9 (divide by -4, both sides)

y = 4(9) (Substitute the x value into first equation)

y = 36