### Collecting like terms

After brackets have been expanded, the like terms can be collected.

#### Example 5

Expand the brackets and collect like terms.

1. $$2(x-6) + 5x$$
2. $$3 + 3(x-1)$$
3. $$3(2x + 4) + 6(x-1)$$

#### Solution

1. $$2(x-6)+5x=2x-12+5x=7x-12$$
2. $$3+3(x-1)=3+3x-3=3x$$
3. $$3(2x+4)+6(x-1)=6x+12+6x-6=12x+6$$