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4-((2*x+7)/9) = 7-(x/3) // - 7-(x/3)
x/3-((2*x+7)/9)-7+4 = 0
(-1*(2*x+7))/9+x/3-7+4 = 0
(-1*3*(2*x+7))/(3*9)+(9*x)/(3*9)+(-7*3*9)/(3*9)+(3*4*9)/(3*9) = 0
9*x-1*3*(2*x+7)-7*3*9+3*4*9 = 0
3*x-189-21+108 = 0
3*x-210+108 = 0
3*x-102 = 0
(3*x-102)/(3*9) = 0
(3*x-102)/(3*9) = 0 // * 3*9
3*x-102 = 0
3*x-102 = 0 // + 102
3*x = 102 // : 3
x = 102/3
x = 34
x = 34
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