What is the solution of the system use substituion 3x-4y=9 - 3x+2y=9

Solve for x in 3x - 4y = 9

x = 9 + 4y/3

Substitute x = 9 + 4y/3 into - 3x + 2y = 9

-9 - 2y = 9

Solve for y in - 9 - 2y = 9

y = - 9

Substitute y = - 9 into x = 9 + 4y/3

x = - 9

Therefore,

x = - 9

y = - 9