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(1/2)*(2*x-7) = 8 // - 8
(1/2)*(2*x-7)-8 = 0
1/2*(2*x-7)-8 = 0
1/2*(2*x-7)-8 = 0
x-23/2 = 0
x-23/2 = 0
x-23/2 = 0 // + 23/2
x = 23/2
x = 23/2
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