Question

Temperatures in f can be converted in c using the formula c=5(f-32)/9

Answer 1

Start with

$c=\dfrac{5(f-32)}{9}$

Multiply both sides by 9:

$9c=5(f-32)$

Divide both sides by 5:

$\dfrac{9c}{5}=f-32$

Add 32 to both sides:

$\dfrac{9c}{5}+32=f$

The lack of parenthesis makes it hard for me to understand what you mean with aC+b/c, since it could be both

$aC+\dfrac{b}{c}$

or

$\dfrac{aC+b}{c}$