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(10/3)*((1/2)*x-(3/5)) = (2/3)*(2*x-(3/8)) // - (2/3)*(2*x-(3/8))
(10/3)*((1/2)*x-(3/5))-((2/3)*(2*x-(3/8))) = 0
(10/3)*((1/2)*x-3/5)+(-2/3)*(2*x-3/8) = 0
10/3*(1/2*x-3/5)-2/3*(2*x-3/8) = 0
10/3*(1/2*x-3/5)-2/3*(2*x-3/8) = 0
1/3*x-7/4 = 0
1/3*x-7/4 = 0
1/3*x-7/4 = 0 // + 7/4
1/3*x = 7/4 // : 1/3
x = 7/4/1/3
x = 21/4
x = 21/4
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