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x-(2*x)-(4/3)+1/7 = 5*x-(1/2) // - 5*x-(1/2)
x-(2*x)-(5*x)-(4/3)+1/7+1/2 = 0
x-2*x-5*x-4/3+1/7+1/2 = 0
-6*x-29/42 = 0 // + 29/42
-6*x = 29/42 // : -6
x = 29/42/(-6)
x = -29/252
x = -29/252
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