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(5/8)*x-(3/4) = 7/4 // - 7/4
(5/8)*x-(3/4)-(7/4) = 0
(5/8)*x-3/4-7/4 = 0
5/8*x-5/2 = 0 // + 5/2
5/8*x = 5/2 // : 5/8
x = 5/2/5/8
x = 4
x = 4
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