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(2/5)*(x+3) = 3 // - 3
(2/5)*(x+3)-3 = 0
2/5*(x+3)-3 = 0
2/5*(x+3)-3 = 0
2/5*x-9/5 = 0
2/5*x-9/5 = 0
2/5*x-9/5 = 0 // + 9/5
2/5*x = 9/5 // : 2/5
x = 9/5/2/5
x = 9/2
x = 9/2
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