1) (x + 22) - 7 = 4x + 22 - 7 = 4x + 15 = 4x = 42 - 1x = 27
Значит, a = 27.
2) (3 - x) + 4 = 13 - x + 4 = 17 - x = 1-x = 15 - -x = x = -8
Значит, a = -8.
1) (x + 22) - 7 = 4
x + 22 - 7 = 4
x + 15 = 4
x = 42 - 1
x = 27
Значит, a = 27.
2) (3 - x) + 4 = 1
3 - x + 4 = 1
7 - x = 1
-x = 15 -
-x =
x = -8
Значит, a = -8.