9. 3(5z - 7) - 2(92 - 11) = 4(8z - 13) - 17
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15z - 21 - 2*81 =32z - 52 - 17
15z-21-162 = 32z - 69
32z-15z = - 183 +69
17z = - 114
Z= - 114/17
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