Real-Life Equations: Identify Variables & Evaluate Expressions

1. Sarah has x apples. If she buys 5 more apples, how many apples does she have now? Write an equation to represent this situation.

• x - 5

• x + 5

• 5 + x

• x * 5

2. A book costs $y. If you buy 3 books, how much do you spend? Write an expression to evaluate the total cost.

• 3y

• $6y

• $y

• $3y + $y

3. Tom is x years old. In 4 years, he will be twice as old as he is now. Write an equation to find x.

• 2x = x + 4

• x - 4 = 2

• 4

• x + 4 = 2x

4. A rectangle has a length of 2x and a width of 3. If the perimeter is 20, what is the value of x?

• 4

• 2

• 3.5

• 5.5

5. If a car travels y miles per hour, how far will it travel in 3 hours? Write an expression to evaluate the distance.

• 6y

• 2y

• 3y

• y/3

6. Lisa has x dollars. If she spends $10, she has $15 left. Write an equation to find how much money she started with.

• 30

• 25

• 20

• 15

7. A pizza has x slices. If you eat 2 slices, how many slices are left? Write an equation to represent this situation.

• slices_left = 2 - x

• slices_left = x - 1

• slices_left = x + 2

• slices_left = x - 2

8. The total cost of 4 notebooks is $y. If each notebook costs $5, write an equation to find y.

• y = 20

• y = 15

• y = 10

• y = 25

9. A garden has x flowers. If 3 flowers wilt, how many flowers are still healthy? Write an equation to find the remaining flowers.

• x + 3

• 3 - x

• x - 1

• x - 3

10. If a train travels at a speed of 60 miles per hour for t hours, how far does it travel? Write an expression to evaluate the distance.

• 60t

• 30t

• 60t + 10

• 120t