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x in (-oo:+oo)
x/8 = 7/5 // - 7/5
x/8-(7/5) = 0
x/8-7/5 = 0
1/8*x-7/5 = 0 // + 7/5
1/8*x = 7/5 // : 1/8
x = 7/5/1/8
x = 56/5
x = 56/5
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