Simplify 10a-7b+11+8a-b-12

$10 a - 7 b + 11 + 8 a - b - 12$

Step 1

Add $10 a$ and $8 a$ .

$18 a - 7 b + 11 - b - 12$

Step 2

Subtract $b$ from $- 7 b$ .

$18 a - 8 b + 11 - 12$

Step 3

Subtract $12$ from $11$ .

$18 a - 8 b - 1$