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x in (-oo:+oo)
3/4 = (8/9)*x // - (8/9)*x
3/4-((8/9)*x) = 0
(-8/9)*x+3/4 = 0
3/4-8/9*x = 0 // - 3/4
-8/9*x = -3/4 // : -8/9
x = -3/4/(-8/9)
x = 27/32
x = 27/32
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