Answer:
a -2b
Step-by-step explanation:
(a−b+c)−(c+b)
Distribute the minus sign
a-b+c -c -b
Combine like terms
a -b -b +c-c
a - 2b
(a - b + c) - (c + b)
= a - b + c - c - b
= a - 2b
