Answer :
You need to add each pair into the equation and see which one will give you -12.
3(-6)+2(7)= -4
3(-4)+2(0)=-12 YES
3(0)+2(7)=14
3(3)+3(-3)=0
3(6)+2(0)=18
3(-6)+2(7)= -4
3(-4)+2(0)=-12 YES
3(0)+2(7)=14
3(3)+3(-3)=0
3(6)+2(0)=18