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x in (-oo:+oo)
x/10 = 4/15 // - 4/15
x/10-(4/15) = 0
x/10-4/15 = 0
1/10*x-4/15 = 0 // + 4/15
1/10*x = 4/15 // : 1/10
x = 4/15/1/10
x = 8/3
x = 8/3
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