Question

what is 4.3h=81.7 solving

Answer 1

Divide both sides of the equation by 4.3 so you will have h=81.7/4.3, which, when simplified, will be the solution. 

Answer 2

It is asking for the value of "h"
to find this out you have to put your variable (h) on one side and your number on the other.  
You divide both sides by 4.3 which makes the equation h=19 and that is your solution