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(6*x-3)/7-((3*x-8)/9) = 0
(6*x-3)/7+(-1*(3*x-8))/9 = 0
(9*(6*x-3))/(7*9)+(-1*7*(3*x-8))/(7*9) = 0
9*(6*x-3)-1*7*(3*x-8) = 0
33*x+29 = 0
(33*x+29)/(7*9) = 0
(33*x+29)/(7*9) = 0 // * 7*9
33*x+29 = 0
33*x+29 = 0 // - 29
33*x = -29 // : 33
x = -29/33
x = -29/33
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