c-300=600
c=900
200+x=900
x=900-200 = 700
800-x=200
-x= 200-800
-x = -600
x = 600
x + 400 = 1000
x= 1000-400
x= 600
19 + x = 25
x = 25-19
x = 6
c - 12 = 65
c = 65+12
c = 77
Пошаговое объяснение:
1)с-300=600
с=600+300
с=900
2)200+x=900
x=900-200
x=700
3)800-x=200
x=800-200
x=600
4)x+400=1000
x=1000-400
5)19+x=25
x=25-19
x=6
6)c-12=65
c=65+12
c=77
c-300=600
c=900
200+x=900
x=900-200 = 700
800-x=200
-x= 200-800
-x = -600
x = 600
x + 400 = 1000
x= 1000-400
x= 600
19 + x = 25
x = 25-19
x = 6
c - 12 = 65
c = 65+12
c = 77
Пошаговое объяснение:
1)с-300=600
с=600+300
с=900
2)200+x=900
x=900-200
x=700
3)800-x=200
x=800-200
x=600
4)x+400=1000
x=1000-400
x=600
5)19+x=25
x=25-19
x=6
6)c-12=65
c=65+12
c=77