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(1/5)*x-2 = 7/8 // - 7/8
(1/5)*x-(7/8)-2 = 0
(1/5)*x-7/8-2 = 0
1/5*x-23/8 = 0 // + 23/8
1/5*x = 23/8 // : 1/5
x = 23/8/1/5
x = 115/8
x = 115/8
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