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a in (-oo:+oo)
5*(-(4*a)-6) = 190 // - 190
5*(-(4*a)-6)-190 = 0
5*(-4*a-6)-190 = 0
5*(-4*a-6)-190 = 0
-20*a-220 = 0
-20*a-220 = 0
-20*a-220 = 0 // + 220
-20*a = 220 // : -20
a = 220/(-20)
a = -11
a = -11
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