1) 12 + x = 2x = 25 - 1x = 13
2) 37 - y = 3y = 37 - 3y = 7
3) a - 15 = a = 8 + 1a = 23
Ответ: x = 13, y = 7, a = 23.
1) 12 + x = 2
x = 25 - 1
x = 13
2) 37 - y = 3
y = 37 - 3
y = 7
3) a - 15 =
a = 8 + 1
a = 23
Ответ: x = 13, y = 7, a = 23.