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(7/2)*x-(9/2) = 5/2 // - 5/2
(7/2)*x-(9/2)-(5/2) = 0
(7/2)*x-9/2-5/2 = 0
7/2*x-7 = 0 // + 7
7/2*x = 7 // : 7/2
x = 7/7/2
x = 2
x = 2
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