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(3/5)*(4*x+3) = 2*(3-(2*x))+15 // - 2*(3-(2*x))+15
(3/5)*(4*x+3)-(2*(3-(2*x)))-15 = 0
(3/5)*(4*x+3)-2*(3-2*x)-15 = 0
3/5*(4*x+3)-2*(3-2*x)-15 = 0
3/5*(4*x+3)-2*(3-2*x)-15 = 0
32/5*x-15-21/5 = 0
32/5*x-96/5 = 0
32/5*x-96/5 = 0
32/5*x-96/5 = 0 // + 96/5
32/5*x = 96/5 // : 32/5
x = 96/5/32/5
x = 3
x = 3
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