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k in (-oo:+oo)
-(3*k)-(4*k)-4 = 73 // - 73
-(3*k)-(4*k)-73-4 = 0
-3*k-4*k-73-4 = 0
-7*k-77 = 0 // + 77
-7*k = 77 // : -7
k = 77/(-7)
k = -11
k = -11
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