Решите неравенства 5x-1>6x+2 -7x+1=<-4x-20
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5х-1>6х+2; 5х-6х>2+1; -х>3; х<-3; х∈(-∞;-3). _____________________________________________________________ -7х+1≤-4х-20; -7х+4х≤-20-1; -3х≤-21; х≥21:3; х≥7; х∈[7;+∞)