Solve the system of equations by substitution x 6 7y 3x y

Solve the system of equations by substitution. x = 6 - 7y 3x - y = 18

x = 6 -7y

Rewriting : x+7y =6 ----(1)

3x -y =18 ----(2)

Multiplying equ 1 by3

3x +21y = 18

3x -y =18

------------- subtracting the two equations:

22y =0

y =0

Now substitutre y=0 in equation 1:

x = 6

Soluion ( 6, 0)