3x+10x<5x-(1-x)
3х+10х<5х-1+х
зх+10х-5х-х<-1
7х<-1
х<-1
7 (-одна седьмая)
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3x+10x<5x-(1-x)
3х+10х<5х-1+х
зх+10х-5х-х<-1
7х<-1
х<-1
7 (-одна седьмая)