# How do you evaluate the expression 7b-5d given b=6, d=5?

Dec 10, 2016

$17$

#### Explanation:

In the expression you substitute $6$ for $b$ and $5$ for $d$, multiply the terms and then subtract:

$\left(7 \cdot 6\right) - \left(5 \cdot 5\right) \to$

$42 - 25$

$17$