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(1/2)*x+3*x-1 = 9/5 // - 9/5
(1/2)*x+3*x-(9/5)-1 = 0
(1/2)*x+3*x-9/5-1 = 0
7/2*x-14/5 = 0 // + 14/5
7/2*x = 14/5 // : 7/2
x = 14/5/7/2
x = 4/5
x = 4/5
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