Combine like terms and evaluate expressions

Front

5x + 3x - 9

Back

8x - 9

Front

8y + 5 - 2y

Back

6y + 5

Front

5a + 2b - 7b + 4a

Back

9a - 5b

Front

Simplify the expression: -3x + 11y - 4x

Back

-7x + 11y

Front

7 - 5m - 10m

Back

7 - 15m

Front

Evaluate 2r + 1 if r = 3

Back

7

Front

3x + 8 if x = 2

Back

14

Front

2q + 3
q = 5 

Back

13

Front

3x + 8   if x = 2

Back

14