First solve the equation for 3x-3x+3y=123x=-57-6yNow substitute the given value into the equation -(-57-6y)+3y=12Then solve for yY=-5Then substitute the given value of y 3x=-57-6βοΈ(-5)Now solve for xX=-9Ordered pairs(X,Y)=(-9,-5)Then you are left with your answer:(-9,-5)Hope this helps! :3