Question

Struggling with this question, if anyone can help it'd be much appreciated

Answer 1

Divide both sides by 5$\pi$

Then you could isolate d.

Answer 2

step 1- simplify 5 times 3.14d to (15.7)d equaling to a= 15.7d
step 2- divide both sides by 15.7 - a/15.7 =d
step 3- switch sides - d=a/15.7
answer: $d= \frac{a}{15.7}$