# How do you simplify the expression  3a+ab-b ?

Jul 6, 2017

The expression as written cannot be simplified further.

#### Explanation:

$3 a + a b - b$ can only be simplified if the values for $a$ and $b$ are known.

For example, let $a = 2$ and $b = 5$. Substitute the values of $a$ and $b$ into the expression and simplify.

$\left(3 \cdot 2\right) + \left(3 \cdot 5\right) - 5$

$6 + 15 - 5$

$16$