Real-Life Problem Solving: Isolate Variables in Equations

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?

• 10

• 4

• 8

• 6

Maria has twice as many marbles as John. If the total number of marbles they have together is 30, how many marbles does John have?

• 15

• 10

• 5

• 20

A car rental company charges a flat fee of $50 plus $0.20 per mile driven. If you paid $70 for your rental, how many miles did you drive?

• 100 miles

• 200 miles

• 150 miles

• 50 miles

Liam has 5 more than twice the number of video games that Emma has. If together they have 35 video games, how many video games does Emma have?

• 15

• 10

• 5

• 20

A gardener is planting flowers in rows. If he plants 3 flowers in each row and has 24 flowers, how many rows can he plant?

• 10

• 12

• 6

• 8

Samantha has $15 more than her brother. If together they have $75, how much money does her brother have?

• 35

• 40

• 30

• 25

A recipe requires 2 cups of sugar for every 3 cups of flour. If you have 9 cups of flour, how many cups of sugar do you need?

• 3 cups of sugar

• 8 cups of sugar

• 6 cups of sugar

• 4 cups of sugar

A book costs $12 and a magazine costs $5. If you buy a total of 8 items and spend $66, how many books did you buy?

• 3

• 6

• 4

• 2

A swimming pool can be filled in 4 hours by one hose and in 6 hours by another. If both hoses are used together, how long will it take to fill the pool?

• 3 hours

• 2.4 hours

• 1.5 hours

• 5 hours

A concert ticket costs $45. If you buy tickets for yourself and 3 friends and spend a total of $180, how many tickets did you buy?

• 2

• 5

• 4

• 3