Solving Real-Life Multi-Step Equations: Isolate Variables

A store sells pencils for $2 each and erasers for $3 each. If you buy a total of 10 items and spend $24, how many pencils did you buy?

• 6

• 8

• 10

• 4

Maria has twice as many marbles as John. If John has x marbles and together they have 36 marbles, how many marbles does John have?

• 12

• 10

• 20

• 15

A recipe requires 3 cups of flour and 2 cups of sugar. If you want to make 4 batches of the recipe, how many cups of flour and sugar do you need in total?

• 12 cups of flour and 8 cups of sugar

• 10 cups of flour and 6 cups of sugar

• 8 cups of flour and 4 cups of sugar

• 15 cups of flour and 10 cups of sugar

In a class, the number of boys is 5 more than twice the number of girls. If there are a total of 35 students in the class, how many boys are there?

• 30

• 20

• 25

• 15

A gardener is planting flowers in rows. If each row has the same number of flowers and there are 3 rows with a total of 36 flowers, how many flowers are in each row?

• 8

• 10

• 15

• 12

A book costs $15 and a magazine costs $5. If you buy a total of 8 items and spend $70, how many books did you buy?

• 4

• 5

• 3

• 2

A swimming pool is filled with water at a rate of 4 gallons per minute. If it takes 30 minutes to fill the pool, how many gallons of water are needed to fill it completely?

• 90 gallons

• 150 gallons

• 120 gallons

• 100 gallons

A concert ticket costs $25, and you also have to pay a $5 service fee. If you buy x tickets and spend a total of $100, how many tickets did you buy?

• 3

• 5

• 4

• 2

A farmer has chickens and cows. If the total number of animals is 50 and there are 3 times as many chickens as cows, how many cows does the farmer have?

• 20

• 15

• 10

• 12