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(7/2)*(8*x-4) = 3 // - 3
(7/2)*(8*x-4)-3 = 0
7/2*(8*x-4)-3 = 0
7/2*(8*x-4)-3 = 0
28*x-17 = 0
28*x-17 = 0
28*x-17 = 0 // + 17
28*x = 17 // : 28
x = 17/28
x = 17/28
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