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