Question

From the sum of 3a + 4b - c and 2a – b + c subtract 4a – 2b + 8.

Answer 1

Answer:

$= {(3a + 4b - c) + (2a - b + c) - (4a - 2b + 8)} \\ = 3a + 2a + 4a + 4b - b - 2b - c - c + 8 \\ = 9a + b + 8$