# How do you evaluate the algebraic expression 3(x- 3)+ 4 for x=7?

Oct 29, 2016

$16$

#### Explanation:

To evaluate this expression you need to substitute $7$ everywhere there is an $x$ to give:

$3 \left(7 - 3\right) + 4$

Then doing the basic arithmetic gives:

$3 \left(4\right) + 4$

$12 + 4$

$16$