No, when you substitute it into the first equation for x and y it does not equal 36 this it's not a solution
(-3)-(3)(11)=36
-3-33=36
-36 =/ 36
To common number is 2 to divide all of them to 2
9x - 3x + x
6x + x
the simplified answer is 7x
The answer should be 1.8 or 1 4/5