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(6*a+2)/9-((7-(2*a))/6) = 0
(6*a+2)/9-((7-2*a)/6) = 0
(6*a+2)/9+(-1*(7-2*a))/6 = 0
(6*(6*a+2))/(6*9)+(-1*9*(7-2*a))/(6*9) = 0
6*(6*a+2)-1*9*(7-2*a) = 0
54*a-51 = 0
(54*a-51)/(6*9) = 0
(54*a-51)/(6*9) = 0 // * 6*9
54*a-51 = 0
54*a-51 = 0 // + 51
54*a = 51 // : 54
a = 51/54
a = 17/18
a = 17/18
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