Question

Solve the following system by using substitute
x - 4y = 28
7y - 6x = - 15

Answer 1

y = -9

x = -8

Explanation:

x = 28 + 4y

7y - 6(28 + 4y) = -15

7y - 168 - 24y = - 15 ---> *distribute the -6, not positive 6*

-17y = 153

y = -9

x = 28 + 4(-9)

x = -8