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x in (-oo:+oo)
(7/8)*x-(3/4) = 5 // - 5
(7/8)*x-(3/4)-5 = 0
(7/8)*x-3/4-5 = 0
7/8*x-23/4 = 0 // + 23/4
7/8*x = 23/4 // : 7/8
x = 23/4/7/8
x = 46/7
x = 46/7
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