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(2/3)*x-9 = (1/2)*x-8 // - (1/2)*x-8
(2/3)*x-((1/2)*x)-9+8 = 0
(2/3)*x+(-1/2)*x-9+8 = 0
1/6*x-1 = 0 // + 1
1/6*x = 1 // : 1/6
x = 1/1/6
x = 6
x = 6
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