a, x = -4 - 30
x = -34
b, x + 24 = 3
x = 3 - 24
x = -21
c, 22 + x = 12
x = 12 - 22
x = -10
d, ( x + 5 ) + ( x - 9 ) - ( x + 2 ) = 0
x + 5 + x - 9 - x - 2 = 0
x + x - x = 2 + 9 - 5
x = 6
e , ( 27 - x ) + ( 15 + x ) - ( x - 24 ) = 0
27 - x + 15 + x - x + 24 = 0
-x + x - x = -24 -15 - 27
-x = -66
=> x = 66