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x in (-oo:+oo)
1/4 = (8/9)*x-(1/8) // - (8/9)*x-(1/8)
1/4-((8/9)*x)+1/8 = 0
(-8/9)*x+1/4+1/8 = 0
3/8-8/9*x = 0 // - 3/8
-8/9*x = -3/8 // : -8/9
x = -3/8/(-8/9)
x = 27/64
x = 27/64
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