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n in (-oo:+oo)
(3*n-7)/(-2) = 5-(0.25*n) // - 5-(0.25*n)
(3*n-7)/(-2)+0.25*n-5 = 0
(3*n-7)/(-2)+(-2*0.25*n)/(-2)+(-5*(-2))/(-2) = 0
3*n-2*0.25*n-5*(-2)-7 = 0
2.5*n-7+10 = 0
2.5*n+3 = 0
(2.5*n+3)/(-2) = 0
(2.5*n+3)/(-2) = 0 // * -2
2.5*n+3 = 0
2.5*n+3 = 0 // - 3
2.5*n = -3 // : 2.5
n = -3/2.5
n = -1.2
n = -1.2
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