Solve the system by subsitutuon || x - 3y = - 18

5x - 3y = 6

X=3y-18

Sub that X=3y-18 into equation 2

5 (3y-18) - 3y = 6

15y - 90 - 3y = 6

15y - 3y = 6 + 90

12y = 96

12y/12 = 96/12

Y = 8

Then sub y=8 in the first equation

x - 3 (8) = - 18

x - 24 = - 18

x = - 18 + 24

x = 6

Therefore the solution is (6,8)

y=6.4

x=5.04

Step-by-step explanation:

x=3y-18

5 (3y-18) = 6

15y-90=6

15y=96

y=6.4

5x-3 (6.4) = 6

5x-19.2=6

5x=25.2

x=5.04