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(3/5)*((2/3)*x-(5/6)) = 3 // - 3
(3/5)*((2/3)*x-(5/6))-3 = 0
(3/5)*((2/3)*x-5/6)-3 = 0
3/5*(2/3*x-5/6)-3 = 0
3/5*(2/3*x-5/6)-3 = 0
2/5*x-7/2 = 0
2/5*x-7/2 = 0
2/5*x-7/2 = 0 // + 7/2
2/5*x = 7/2 // : 2/5
x = 7/2/2/5
x = 35/4
x = 35/4
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