Question

How do you solve `-3+ 3u = 15`?

Answer 1

`u=6`

Explanation:

Add three on both sides:
`3u-cancel(3+3)=15+3`

`3u=18`

Divide both sides by `3`:
`(cancel(3)u)/cancel3=18/3`

`u=6`

Answer 2

`u=6`

Explanation:

`-3+3u=15`

`3u=15+3`

`3u=18`

`u=18/3`

`u=6`