Mastering One-Variable Equations in Word Problems

Ava has 12 apples. She gives away some apples to her friends and now has 5 left. How many apples did she give away?

• 5

• 7

• 3

• 10

Tom is 3 years older than his sister. If his sister is x years old, write an equation to find Tom's age.

• Tom's age = x + 3

• Tom's age = x - 3

• Tom's age = x + 5

• Tom's age = 2x + 3

A book costs $15. If you buy x books, how much will you spend in total? Write an equation to represent this situation.

• total_cost = 15 + x

• total_cost = 15 * x

• total_cost = x - 15

• total_cost = 15 / x

Liam has a collection of 50 stamps. He buys x more stamps. Write an equation to express the total number of stamps he has now.

• total_stamps = 50 + x

• total_stamps = 50 * x

• total_stamps = 50 / x

• total_stamps = 50 - x

A car travels 60 miles per hour. How far will it travel in x hours? Write an equation to represent this scenario.

• distance = 60 + x

• distance = 60 * x

• distance = 60 / x

• distance = 60 - x

Sarah has $100. She spends x dollars on a new dress. How much money does she have left? Write an equation to find the remaining amount.

• 100 - x

• 100 / x

• 100 + x

• x - 100

A rectangle has a length of 10 cm and a width of x cm. If the perimeter is 40 cm, write an equation to find the width.

• 10 cm

• 15 cm

• 5 cm

• 20 cm

In a class, there are 20 students. If x students are boys, how many girls are there? Write an equation to express this relationship.

• x + 20

• x - 20

• 20 - x

• 20 - 2x

A pizza is cut into 8 slices. If you eat x slices, how many slices are left? Write an equation to find the remaining slices.

• R = 8 * x

• R = 8 + x

• R = 8 - x

• R = 8 / x

A gardener plants x flowers in each of the 5 rows. If he plants a total of 30 flowers, write an equation to find the number of flowers in each row.

• 5

• 7

• 8

• 6