Question

Solve the System by substitution

y=9x
y=3x+12

Answer 1

9x=3x+12
9x-3x=12
6x=12
x=12/6
x=2

y=9x
=9*2
=18

Answer 2

(2, 18) or x = 2 and y = 18

Explanation:

From substitution:

9x = 3x + 12

6x = 12

x = 2

y = 9x = 9 * 2 = 18