Автор - Tolovirko84
x - 18 = 29
x = 29 + 18
x = 47
x + 15 = 25
x = 25 - 15
x = 10
64 - a = 52
a = 64 - 52
a = 12
17 + b = 28
b = 28 - 17
b = 11
x - 23 = 57
x = 57 + 23
x = 80
48 - x = 20
x = 48 - 20
x = 28
Ответ:
x+15=25 64-a=52 x-18=29
x=25-15 a=64-52 x=29+18
x=15 a=12 x=47
x-23=57 48-x=20 17+b=28
x=23+57 x=48-20 b=28-17
x=80 x=28 b=11