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x-(3*(2*x-5)) = (4/5)*(3*x-4) // - (4/5)*(3*x-4)
x-(3*(2*x-5))-((4/5)*(3*x-4)) = 0
(-4/5)*(3*x-4)-3*(2*x-5)+x = 0
x-3*(2*x-5)-4/5*(3*x-4) = 0
x-3*(2*x-5)-4/5*(3*x-4) = 0
x-42/5*x+91/5 = 0
91/5-37/5*x = 0
91/5-37/5*x = 0
91/5-37/5*x = 0 // - 91/5
-37/5*x = -91/5 // : -37/5
x = -91/5/(-37/5)
x = 91/37
x = 91/37
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