Final answer:
To create a word problem for the equation 3(2+7x)=90, think about a situation where a certain quantity is three times the sum of two and seven times a variable.
Step-by-step explanation:
To create a word problem for the equation 3(2+7x)=90, we can think about a situation where a certain quantity is three times the sum of two and seven times a variable.
For example:
Sam has a collection of baseball cards. He has 2 cards already and he plans to buy 7 more cards every week. After some time, the total number of cards Sam has will be three times the sum of 2 and 7 times the number of weeks he has been buying cards. If the equation 3(2+7x)=90 represents the total number of cards Sam has, find the number of weeks he has been buying cards.