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x in (-oo:+oo)
2*x-(5*((1/2)*x-1)) = 1 // - 1
2*x-(5*((1/2)*x-1))-1 = 0
2*x-5*((1/2)*x-1)-1 = 0
2*x-5*(1/2*x-1)-1 = 0
2*x-5*(1/2*x-1)-1 = 0
5-1/2*x-1 = 0
4-1/2*x = 0
4-1/2*x = 0
4-1/2*x = 0 // - 4
-1/2*x = -4 // : -1/2
x = -4/(-1/2)
x = 8
x = 8
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