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x in (-oo:+oo)
x/8 = 8/9 // - 8/9
x/8-(8/9) = 0
x/8-8/9 = 0
1/8*x-8/9 = 0 // + 8/9
1/8*x = 8/9 // : 1/8
x = 8/9/1/8
x = 64/9
x = 64/9
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