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3*x-(7/3) = 4*(2*x-1) // - 4*(2*x-1)
3*x-(4*(2*x-1))-(7/3) = 0
3*x-4*(2*x-1)-7/3 = 0
(-4*3*(2*x-1))/3+(3*3*x)/3-7/3 = 0
3*3*x-4*3*(2*x-1)-7 = 0
12-15*x-7 = 0
5-15*x = 0
(5-15*x)/3 = 0
(5-15*x)/3 = 0 // * 3
5-15*x = 0
5-15*x = 0 // - 5
-15*x = -5 // : -15
x = -5/(-15)
x = 1/3
x = 1/3
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