а) 7-3х=11
-3х=11-7
-3х=4
х=-4/3=-1 1/3
7-3х=-11
-3х=-11-7
-3х=-18
х=6
б)5х+1<=4
5х<=4-1
5х<=3
х<=3/5
5х+1<=-4
5х<=-4-1
5х<=-5
х<=-1
а) 7-3х=11
-3х=11-7
-3х=4
х=-4/3=-1 1/3
7-3х=-11
-3х=-11-7
-3х=-18
х=6
б)5х+1<=4
5х<=4-1
5х<=3
х<=3/5
5х+1<=-4
5х<=-4-1
5х<=-5
х<=-1