7th Grade One Variable Equations: Set Up & Solve

Maria has 3 more than twice the number of apples that John has. If John has x apples, write an equation to represent the number of apples Maria has and solve for x if Maria has 15 apples.

• 8

• 4

• 6

• 10

A book costs $12. If you have $x, how much more money do you need to buy the book? Write an equation and solve for x if you have $8.

• 4

• 10

• 6

• 2

A rectangle's length is 4 meters more than its width. If the width is w meters, write an equation for the length and solve for w if the perimeter is 28 meters.

• 6

• 4

• 7

• 5

Tom is 5 years older than his sister. If his sister is y years old, write an equation for Tom's age and solve for y if Tom is 15 years old.

• 10

• 14

• 8

• 12

A concert ticket costs $50. If you have $x and want to buy 2 tickets, write an equation to find out how much more money you need and solve for x if you currently have $80.

• 20

• 50

• 30

• 10

The sum of a number and 9 is equal to 25. Write an equation to represent this situation and solve for the number.

• 20

• 15

• 10

• 16

A car rental company charges a flat fee of $30 plus $0.20 per mile driven. If you have $x to spend, write an equation to find out how many miles you can drive and solve for x if you want to drive 100 miles.

• $40

• $60

• $70

• 50

Lisa has twice as many stickers as Mark. If Mark has m stickers, write an equation for the number of stickers Lisa has and solve for m if Lisa has 24 stickers.

• 20

• 12

• 14

• 10

A school is selling tickets for a play. Adult tickets cost $10 and student tickets cost $5. If the total revenue from selling x adult tickets and y student tickets is $200, write an equation and solve for x if 10 student tickets were sold.

• 5

• 10

• 20

• 15

A gardener has 50 plants. If he plants x more plants, he will have twice as many plants as he started with. Write an equation to represent this situation and solve for x.

• 75

• 100

• 50

• 25