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1/2-x = (5/6)*x-(1/9) // - (5/6)*x-(1/9)
1/2-x-((5/6)*x)+1/9 = 0
(-5/6)*x-x+1/2+1/9 = 0
11/18-11/6*x = 0 // - 11/18
-11/6*x = -11/18 // : -11/6
x = -11/18/(-11/6)
x = 1/3
x = 1/3
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