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x= 12:-4
x= -3
x=12\-4
x=-3
16. 3(1-q)+4(q-5)=-5
3-3q+4q-20=-5
q-17 =-5
q=-5+17
q= 12
17. 4(x-3)-2(x-3)=8
4x-12-2x+6=8
2x-6=8
2x=8+6
2x=14
x=7