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x in (-oo:+oo)
x/8 = 5/3 // - 5/3
x/8-(5/3) = 0
x/8-5/3 = 0
1/8*x-5/3 = 0 // + 5/3
1/8*x = 5/3 // : 1/8
x = 5/3/1/8
x = 40/3
x = 40/3
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