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(6/7)*(2*x-(5/2)) = 8 // - 8
(6/7)*(2*x-(5/2))-8 = 0
(6/7)*(2*x-5/2)-8 = 0
6/7*(2*x-5/2)-8 = 0
6/7*(2*x-5/2)-8 = 0
12/7*x-71/7 = 0
12/7*x-71/7 = 0
12/7*x-71/7 = 0 // + 71/7
12/7*x = 71/7 // : 12/7
x = 71/7/12/7
x = 71/12
x = 71/12
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