Real-Life Equations: Solving for Unknowns in Context

Maria has 3 times as many apples as John. If John has x apples, how many apples does Maria have?

• x

• 2x

• 3x

• 4x

A book costs $15. If you buy y books, how much do you spend in total?

• 15y

• $10y

• $30

• $15 + y

Tom has $50. He spends some money and now has z dollars left. How much did he spend?

• 50 + z

• z - 50

• 50 / z

• 50 - z

A rectangle has a length of 4 meters and a width of w meters. If the perimeter is 20 meters, what is w?

• 7 meters

• 8 meters

• 5 meters

• 6 meters

Lily is 12 years old. Her brother is b years younger than her. How old is her brother?

• b + 12

• 12 + b

• 12 - 12

• 12 - b

A car travels at a speed of 60 miles per hour. If it travels for t hours, how far does it go?

• 60t miles

• 120t miles

• 30t miles

• 60t kilometers

The total cost of 5 notebooks is $25. If each notebook costs n dollars, what is n?

• 10

• 7

• 5

• 3

A pizza is cut into 8 slices. If you eat e slices, how many slices are left?

• 8 - e

• e slices

• 8 + e

• 8 - 2e

A school has 200 students. If s students are in the 6th grade, how many are not in the 6th grade?

• 200 - s

• s + 50

• 200 + s

• s - 200

A box contains x candies. If you add 10 more candies, the total becomes 50. How many candies were in the box originally?

• 30

• 40

• 20

• 50