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x in (-oo:+oo)
5/8 = x/56 // - x/56
5/8-(x/56) = 0
5/8-1/56*x = 0 // - 5/8
-1/56*x = -5/8 // : -1/56
x = -5/8/(-1/56)
x = 35
x = 35
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