Simplify (11a-b+c)+(-8a-c)

$(11 a - b + c) + (- 8 a - c)$

Step 1

Remove parentheses.

$11 a - b + c - 8 a - c$

Step 2

Combine the opposite terms in $11 a - b + c - 8 a - c$ .

Subtract $c$ from $c$ .

$11 a - b - 8 a + 0$

Add $11 a - b - 8 a$ and $0$ .

$11 a - b - 8 a$

Step 3

Subtract $8 a$ from $11 a$ .

$3 a - b$