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0.75*(8*x-4) = (2/3)*(6*x-9) // - (2/3)*(6*x-9)
0.75*(8*x-4)-((2/3)*(6*x-9)) = 0
0.75*(8*x-4)+(-2/3)*(6*x-9) = 0
0.75*(8*x-4)-2/3*(6*x-9) = 0
0.75*(8*x-4)-2/3*(6*x-9) = 0
2*x+3 = 0
2*x+3 = 0
2*x+3 = 0 // - 3
2*x = -3 // : 2
x = -3/2
x = -3/2
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