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3*x+x-(7/9) = 3*x+7/3+1 // - 3*x+7/3+1
3*x+x-(3*x)-(7/9)-(7/3)-1 = 0
3*x+x-3*x-7/9-7/3-1 = 0
x-37/9 = 0 // + 37/9
x = 37/9
x = 37/9
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