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(x+3)/2+x-1 = 4/5 // - 4/5
(x+3)/2+x-(4/5)-1 = 0
(x+3)/2+x-4/5-1 = 0
(5*(x+3))/(2*5)+(2*5*x)/(2*5)+(-4*2)/(2*5)+(-1*2*5)/(2*5) = 0
5*(x+3)+2*5*x-4*2-1*2*5 = 0
15*x-10-8+15 = 0
15*x-10+7 = 0
15*x-3 = 0
(15*x-3)/(2*5) = 0
(15*x-3)/(2*5) = 0 // * 2*5
15*x-3 = 0
15*x-3 = 0 // + 3
15*x = 3 // : 15
x = 3/15
x = 1/5
x = 1/5
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