Ответ:
4х+9>=-5
4х>=-5-9
4х>=-14
х>=-14/4=-7/2
4х+9<7
4х<7-9
4х<-2
х<-2/4=-1/2
[-7/2;1/2)
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Ответ:
4х+9>=-5
4х>=-5-9
4х>=-14
х>=-14/4=-7/2
4х+9<7
4х<7-9
4х<-2
х<-2/4=-1/2
[-7/2;1/2)