How do you work out:

3b+5+2b

We can solve the expression by combining the numbers with similar signs

3b + 5 + 2b

Becomes,

5b+5.

An example:

10 (2x + 9) + 10x - 12

Solution.

1. 10 (2x + 9) + 10x - 12

2. 20x + 90 + 10x - 12

3. 20x + 10x + 90 - 12

Simplest form will be,

4. 30x + 78

5. 30x = - 78

6. x = - 2.6