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a in (-oo:+oo)
-36/41 = (12*a)/41 // - (12*a)/41
-((12*a)/41)-36/41 = 0
(-12/41)*a-36/41 = 0
-12/41*a-36/41 = 0 // + 36/41
-12/41*a = 36/41 // : -12/41
a = 36/41/(-12/41)
a = -3
a = -3
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