3.RA.D.9

Write and solve two-step problems involving variables using any of the four operations.

Example Problems
A truck is traveling at .
Write an expression for how many miles the truck travels after
.
John used a $100 bill to pay for a pair of shoes that costs z dollars.
Write an expression for how much change John received from the cashier.
Megan is a teacher. She needs to buy 7 notebooks for each student. There are students.
Write an expression for how many total notebooks she needs to buy.
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