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3*(x-3) = 2*a-(3/5) // - 2*a-(3/5)
3*(x-3)-(2*a)+3/5 = 0
3*(x-3)-2*a+3/5 = 0
(3*5*(x-3))/5+(-2*5*a)/5+3/5 = 0
3*5*(x-3)-2*5*a+3 = 0
15*x-10*a-45+3 = 0
15*x-10*a-42 = 0
(15*x-10*a-42)/5 = 0
(15*x-10*a-42)/5 = 0 // * 5
15*x-10*a-42 = 0
15*x-10*a-42 = 0 // + -10*a-42
15*x = -(-10*a-42) // : 15
x = (-(-10*a-42))/15
x = (42-(-10*a))/15
x = (42-(-10*a))/15
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