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x in (-oo:+oo)
(1/5)*(2*x+5) = X+2 // - X+2
(1/5)*(2*x+5)-X-2 = 0
1/5*(2*x+5)-X-2 = 0
1/5*(2*x+5)-X-2 = 0
2/5*x-X-2+1 = 0
2/5*x-X-1 = 0
2/5*x-X-1 = 0
2/5*x-X-1 = 0 // + -X-1
2/5*x = -(-X-1) // : 2/5
x = (-(-X-1))/2/5
x = 5/2*(X+1)
x = 5/2*(X+1)
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