13-2а=21
2а=–7
а=–3,5
19-3м=2м+49
-5м=30
м=–6
2х+22=-6-26
2х=–54
х=–27
-9с-1=41-2с
-7с=40
с=–5 5/7
-3(х+2)-9=-30
-3х-6-9=-30
-3х=-15
х=5
9m-9=-45
9m=-36
m=-4
28-4(х-7)=36
28-4х+28=36
-4х=-20
-14х-6=42-6х
-8х=48
х=-6
-7m-1=-29
-7m=-28
m=4
5(b+2)-4=31
5b+10-4=31
5b=25
b=5
13-2а=21
2а=–7
а=–3,5
19-3м=2м+49
-5м=30
м=–6
2х+22=-6-26
2х=–54
х=–27
-9с-1=41-2с
-7с=40
с=–5 5/7
-3(х+2)-9=-30
-3х-6-9=-30
-3х=-15
х=5
9m-9=-45
9m=-36
m=-4
28-4(х-7)=36
28-4х+28=36
-4х=-20
х=5
-14х-6=42-6х
-8х=48
х=-6
-7m-1=-29
-7m=-28
m=4
5(b+2)-4=31
5b+10-4=31
5b=25
b=5