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n in (-oo:+oo)
(2/3)*(5*n-1) = (-3/5)*(n+2) // - (-3/5)*(n+2)
(2/3)*(5*n-1)-((-3/5)*(n+2)) = 0
(2/3)*(5*n-1)+(3/5)*(n+2) = 0
2/3*(5*n-1)+3/5*(n+2) = 0
2/3*(5*n-1)+3/5*(n+2) = 0
59/15*n+8/15 = 0
59/15*n+8/15 = 0
59/15*n+8/15 = 0 // - 8/15
59/15*n = -8/15 // : 59/15
n = -8/15/59/15
n = -8/59
n = -8/59
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