Solving Real-World Equations: 7th Grade Math Challenges

A store sells pencils for $0.50 each. If you buy x pencils, how much do you spend? Write an equation to represent the total cost.

• total cost = 0.50 - x

• total cost = 0.50 / x

• total cost = x + 0.50

• total cost = 0.50 * x

Maria has 3 times as many marbles as John. If John has y marbles, write an equation to express how many marbles Maria has.

• M = y + 3

• M = 3y

• M = 2y

• M = y/3

A car rental company charges a flat fee of $20 plus $0.15 per mile driven. If you drive m miles, write an equation for the total cost of the rental.

• Total Cost = 20 + 0.10 * m

• Total Cost = 15 + 0.15 * m

• Total Cost = 20 + 0.15 * m

• Total Cost = 20 - 0.15 * m

A recipe requires 2 cups of flour for every 3 cups of sugar. If you have s cups of sugar, how many cups of flour do you need? Write an equation to represent this relationship.

• (2/3) * s

• s / 2

• (3/2) * s

• s + 2

A gym charges a monthly fee of $30 plus $5 for each class attended. If you attend c classes, write an equation for the total monthly cost.

• Total Cost = 30 + 10c

• Total Cost = 30 - 5c

• Total Cost = 30 + 5c

• Total Cost = 5c

A farmer has 50 apples and wants to distribute them equally among x baskets. Write an equation to find out how many apples will be in each basket.

• 50 + x

• 50 * x

• 50 - x

• 50 / x

A concert ticket costs $45. If you buy t tickets, write an equation to find the total cost of the tickets.

• total cost = 45 - t

• total cost = 45 / t

• total cost = 45 * t

• total cost = 45 + t

A book costs $12. If you have b books, write an equation to determine the total cost of the books you want to buy.

• total_cost = b + 12

• total_cost = 12 - b

• total_cost = 12 * b

• total_cost = 12 / b

A swimming pool is filled with water at a rate of 10 gallons per minute. If it takes m minutes to fill the pool, write an equation to express the total gallons of water needed.

• 15m

• 10m

• 5m

• 10m^2

A school is planning a field trip. The cost per student is $25. If there are s students going, write an equation to find the total cost of the trip.

• total cost = s - 25

• total cost = 25 * s

• total cost = 25 / s

• total cost = 25 + s