Given data:
The first equation is 2x+3y=-12.
The second equation is x+y=9.
The second equation can be written as,
y=9-x
Substitute the above value in second equation.
2x+3(9-x)=-12
2x+27-3x=-12
-x=-39
x=39
The value of y is,
39+y=9
y=-30.
Thus, the value of x is 39, and the value of y is -30.