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