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(1/2)*(2*x-4) = 3 // - 3
(1/2)*(2*x-4)-3 = 0
1/2*(2*x-4)-3 = 0
1/2*(2*x-4)-3 = 0
x-5 = 0
x-5 = 0
x-5 = 0 // + 5
x = 5
x = 5
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