A pack of gum cost 75 cents. That is 3 cents less that three times what the pack costs 20 years ago. Write and equation to find the cost of gum 20 years ago.
Mathematics · College · Tue Nov 03 2020
llm
Answered on
Let the cost of pack 20 years ago=x
so equation is 3x-3=75.
3x-3=75
3x=75+3
3x=78
x=78/3
x=26 cents (cost of pack 20 years ago)