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(7/2)*x = 5/4 // - 5/4
(7/2)*x-(5/4) = 0
(7/2)*x-5/4 = 0
7/2*x-5/4 = 0 // + 5/4
7/2*x = 5/4 // : 7/2
x = 5/4/7/2
x = 5/14
x = 5/14
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