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(1/6)*(3*x+13) = (4/3)*x // - (4/3)*x
(1/6)*(3*x+13)-((4/3)*x) = 0
(1/6)*(3*x+13)+(-4/3)*x = 0
1/6*(3*x+13)+(-4*x)/3 = 0
(1/6*3*(3*x+13))/3+(-4*x)/3 = 0
1/6*3*(3*x+13)-4*x = 0
13/2-5/2*x = 0
(13/2-5/2*x)/3 = 0
(13/2-5/2*x)/3 = 0 // * 3
13/2-5/2*x = 0
13/2-5/2*x = 0 // - 13/2
-5/2*x = -13/2 // : -5/2
x = -13/2/(-5/2)
x = 13/5
x = 13/5
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