Question

3(5z-7)+2(9z-11)=4(8z-7)-111

Answer 1

15z-21+18z-22=32z-28-111

15z+18z-32z=-29-111+21+22

33z-32z=-139+43

z=-96

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Answer 2

3*5z-3*7+2*9z-2*11=4*8z-4*7-111
15z-21+18z-22=32z-28-111
33z-43=32z-139
33z-32z=43-139
z=-96