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(0.5*x+7)/8 = 5 // - 5
(0.5*x+7)/8-5 = 0
(0.5*x+7)/8+(-5*8)/8 = 0
0.5*x-5*8+7 = 0
0.5*x-33 = 0
(0.5*x-33)/8 = 0
(0.5*x-33)/8 = 0 // * 8
0.5*x-33 = 0
0.5*x-33 = 0 // + 33
0.5*x = 33 // : 0.5
x = 33/0.5
x = 66
x = 66
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