
2)67-21y=25
21y=-42
y=-2
4)83+29x=982
29x=899
x=31
2)(63-y)+109=121
63-y=12
y=51
4)103-(z+47)=54
z+47=-49
z=-96
2)122+(y-7)=200
y-7=78
y=85
4)53-(y-13)=24
y-13=-29
y=-16
2)(200+x):12=32
200+x=384
x=184
4)729:(c-15)=81
C-15=9
C=24
6)12×(97-z)=240
97-z=20
Z=77