Question

How do you solve `-3(r-11) + 15 ≥ 9`?

Answer 1

First work out the brackets:

`-3*r-3*(-11)+15>=9->`

`-3r+33+15>=9->`

Remember, adding and subtracting may allways be done, so we add `3r` to both sides, and we subtract `9`:

`33+15-9>=3r->39>=3r->`

Divide by `3`:

`13>=r->r<=13`