Step-by-step explanation:
There are two terms in this equation. The first is 20h and the second is 300 and 250.
So u group like terms and its going to be
20h=300-250
The 250 is negated because it has crossed the equal sign
20h=50
Divide both terms by 20 since you want to find the value of h
Then you will get your answer to be 2.5