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(2/5)*x+3*x+3/5 = -11/10 // + -11/10
(2/5)*x+3*x+3/5-(-11/10) = 0
(2/5)*x+3*x+3/5+11/10 = 0
17/5*x+17/10 = 0 // - 17/10
17/5*x = -17/10 // : 17/5
x = -17/10/17/5
x = -1/2
x = -1/2
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