Question

What is the value of the expression `7 + 2(x-9)-(x+2)` when `x=-3`?

Answer 1

`-16`

Explanation:

To solve this, we['ll use what is known as substitution, where we replace something with something that we know. In this case, wherever we see `x`, we replace it with a `-3`:
`7+2(x-9)-(x+2)=7+2((-3)-9)-((-3)+2)`
`=7+2(-12)-(-1)`
`=7-24+1`
`=-16`