1) х - 18 = 29х = 29 + 18х = 47
2) х + 15 = 25х = 25 - 15х = 10
3) 64 - а = 52а = 64 - 52а = 12
4) 17 + b = 28b = 28 - 17b = 11
5) x - 23 = 57x = 57 + 23x = 80
6) 48 - x = 20x = 48 - 20x = 28
1) х - 18 = 29
х = 29 + 18
х = 47
2) х + 15 = 25
х = 25 - 15
х = 10
3) 64 - а = 52
а = 64 - 52
а = 12
4) 17 + b = 28
b = 28 - 17
b = 11
5) x - 23 = 57
x = 57 + 23
x = 80
6) 48 - x = 20
x = 48 - 20
x = 28