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3*x+7*x-2/3 = -46/9 // + -46/9
3*x+7*x-2/3-(-46/9) = 0
3*x+7*x-2/3+46/9 = 0
10*x+40/9 = 0 // - 40/9
10*x = -40/9 // : 10
x = -40/9/10
x = -4/9
x = -4/9
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