Solving One-Step Algebra: Key Info & Inverse Ops

Sarah has some marbles. If she gives away 5 marbles, she will have 12 left. How many marbles did she start with?

• 10

• 15

• 17

• 20

A book costs $15. If you have $x and you buy the book, you will have $5 left. What is the value of x?

• 20

• 10

• 25

• 30

Tom is 3 years older than his brother. If his brother is y years old, how old is Tom?

• y + 3

• y + 5

• y + 2

• y - 3

A box contains some chocolates. If you eat 8 chocolates, there are 20 left. How many chocolates were in the box originally?

• 24

• 28

• 18

• 30

Lisa has a collection of stickers. If she buys 10 more stickers, she will have 50 stickers in total. How many stickers did she have before?

• 60

• 20

• 30

• 40

A farmer has x apples. If he sells 15 apples, he has 25 apples left. How many apples did he start with?

• 30

• 35

• 40

• 50

In a classroom, there are 30 students. If 10 students leave, how many students are left? Write an equation to find the number of students left.

• 25

• 15

• 20

• 10

A car travels 60 miles per hour. If it travels for t hours, how far does it go? Write an equation to express this relationship.

• distance = 60t

• distance = 60t^2

• distance = 60 + t

• distance = 30t

Emma has $40. If she spends $x on a toy, she will have $15 left. How much did she spend on the toy?

• 35

• 20

• 25

• 30

A recipe calls for 2 cups of sugar. If you have y cups of sugar and you use 1 cup, how much sugar do you have left?

• y - 1

• y - 2

• y + 1

• 2 cups of sugar