# How do you evaluate 3( a + c/a) -b  given a= 2, b= 7, and c= 4?

Aug 2, 2016

If $a = 2$, $b = 7$ and $c = 4$, $3 \left(a + \frac{c}{a}\right) - b = 5$

#### Explanation:

As $a = 2$, $b = 7$ and $c = 4$,

$3 \left(a + \frac{c}{a}\right) - b$

$\Leftrightarrow 3 \left(2 + \frac{4}{2}\right) - 7$

= $3 \left(2 + 2\right) - 7$

= $3 \times 4 - 7$

= $12 - 7 = 5$