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3*x-((2/3)*(2*x-1)) = 4 // - 4
3*x-((2/3)*(2*x-1))-4 = 0
(-2/3)*(2*x-1)+3*x-4 = 0
3*x-2/3*(2*x-1)-4 = 0
3*x-2/3*(2*x-1)-4 = 0
5/3*x-4+2/3 = 0
5/3*x-10/3 = 0
5/3*x-10/3 = 0
5/3*x-10/3 = 0 // + 10/3
5/3*x = 10/3 // : 5/3
x = 10/3/5/3
x = 2
x = 2
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