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(-1/2)*x-(1/3) = 5/6-4*x // - 5/6-4*x
(-1/2)*x-(-4*x)-(1/3)-(5/6) = 0
(-1/2)*x+4*x-1/3-5/6 = 0
7/2*x-7/6 = 0 // + 7/6
7/2*x = 7/6 // : 7/2
x = 7/6/7/2
x = 1/3
x = 1/3
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