Answer:
a) x = -8
Step-by-step explanation:
Equation: x + (a + c) = a
Associative property of addition: x + a + c = a
Subtract: x + c = 0
Plug in c = 8: x + 8 = 0
Subtract: x = -8
x + (6 + 8)= 6
x + 14 = 6
x = -8
