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6*x+(2/6)*x-7 = 2*x+(5/2)*x-7 // - 2*x+(5/2)*x-7
6*x+(2/6)*x-(2*x)-((5/2)*x)-7+7 = 0
6*x+(2/6)*x-2*x+(-5/2)*x-7+7 = 0
11/6*x = 0 // : 11/6
x = 0
x = 0
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