Simplify by removing all grouping symbols and combining like terms. (10a - 10b + c) - (a - b - 2c)
A) 9a - 9b + 3c
B) 9a - 11b + 3c
C) 9a - 9b - c
D) 9a - 11b - c

Question

Quizplus · Accepted Answer

First, distribute the negative sign in the second group: (10a - 10b + c) - a + b + 2c. Then, combine like terms: 10a - a = 9a, -10b + b = -9b, c + 2c = 3c. So, the simplified expression is 9a - 9b + 3c.

Simplify by Removing All Grouping Symbols and Combining Like Terms