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(3/4)*(12*x+10) = (2/3)*(6*x+9) // - (2/3)*(6*x+9)
(3/4)*(12*x+10)-((2/3)*(6*x+9)) = 0
(3/4)*(12*x+10)+(-2/3)*(6*x+9) = 0
3/4*(12*x+10)-2/3*(6*x+9) = 0
3/4*(12*x+10)-2/3*(6*x+9) = 0
5*x+3/2 = 0
5*x+3/2 = 0
5*x+3/2 = 0 // - 3/2
5*x = -3/2 // : 5
x = -3/2/5
x = -3/10
x = -3/10
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