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(1/2)*(2*x-6) = (2/3)*(12*x-9) // - (2/3)*(12*x-9)
(1/2)*(2*x-6)-((2/3)*(12*x-9)) = 0
(1/2)*(2*x-6)+(-2/3)*(12*x-9) = 0
1/2*(2*x-6)-2/3*(12*x-9) = 0
1/2*(2*x-6)-2/3*(12*x-9) = 0
3-7*x = 0
3-7*x = 0
3-7*x = 0 // - 3
-7*x = -3 // : -7
x = -3/(-7)
x = 3/7
x = 3/7
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