Answer:
75=3(x)-3
Step-by-step explanation:
Translating the words into math, we get the following:
"A pack of gum costs 75 cents." tells us that a pack of gum is 75 cents.
"That is 3 cents less than three times what the pack cost 20 years ago" tells us that 3(x)-3 cents is how much it costed 20 years ago.
Setting these equal we get 75=3(x)-3 which tells us that x=26 which means the pack of gum costed 26 cents 20 years ago.
