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(6*x+1)/12-((x-13)/9) = (5*x-3)/2+x/30 // - (5*x-3)/2+x/30
(6*x+1)/12-((x-13)/9)-((5*x-3)/2)-(x/30) = 0
(6*x+1)/12+(-1*(x-13))/9+(-1*(5*x-3))/2-x/30 = 0
(2*9*30*(6*x+1))/(2*9*12*30)+(-1*2*12*30*(x-13))/(2*9*12*30)+(-1*9*12*30*(5*x-3))/(2*9*12*30)+(2*9*12*(-x))/(2*9*12*30) = 0
2*9*30*(6*x+1)-1*2*12*30*(x-13)-1*9*12*30*(5*x-3)+2*9*12*(-x) = 0
2520*x-16200*x-216*x+9720+9900 = 0
19620-13680*x-216*x = 0
19620-13896*x = 0
(19620-13896*x)/(2*9*12*30) = 0
(19620-13896*x)/(2*9*12*30) = 0 // * 2*9*12*30
19620-13896*x = 0
19620-13896*x = 0 // - 19620
-13896*x = -19620 // : -13896
x = -19620/(-13896)
x = 545/386
x = 545/386
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