Question

How would I solve 7r=-7/2? I know the answer is -1/2 I just don't understand how to get -1/2 as my answer.

Answer 1

$7r=-\dfrac{7}{2}\\ r=-\dfrac{7}{2}\div7\\ r=-\dfrac{7}{2}\cdot\dfrac{1}{7}\\ r=-\dfrac{1}{2}$