Worth 10 points!
how do you solve expressions using real world problems?

Karen bakes cookies every day. How many total cookies would she bake in seven days?Solution: 7c

Eden caught fourteen fish and ate some.Solution: 14−x

Jessica read a few books each week. How many did she read over four weeks?Solution: 4x


Kelly and the other hikers are trying to divide up all of the things that they need for their trip. The group wants the division of items to be equitable so that each person carries the same amount. If there are seven hikers, how can they figure this out? The group isn't sure how many items will need to be carried.

→Is there a way to write a variable expression to figure this out?

⊂We can write a variable expression to figure out how many items each person will carry.⊃

First, think about the variable. The unknown quantity is the number of items. Let's call that x.

→There are seven people to carry these items.

⇒We can divide the total number of items by 7.

Here is our answer.
                  
X/7


∑Guided Practice

⇒Here is one for you to try on your own.

⇒Write a variable expression to express the following situation.

⇒John runs every day. The number of miles that he runs varies per day. Sometimes he runs four miles and sometimes two miles.
 
⇒Write a variable expression to show John's total miles for three days.

Answer
⇒The number of miles that John runs per day is our variable. That is an amount that changes. We can call that m.We want the total miles for three days.

⇒Our answer is 3m.