# How do you write the expression for: Nine times the difference of y and z, increased by 3z?

Nov 15, 2016

$\left(9 \cdot \left(y - z\right)\right) + 3 z$

#### Explanation:

"the difference of y and z" can be written as $y - z$.

"Nine times" this difference can be written as: $9 \cdot \left(y - z\right)$

and if you "increase this term by $3 z$" you will have:

$\left(9 \cdot \left(y - z\right)\right) + 3 z$