Creating Equations with One Variable

4 is the quotient of 16 and a number n.

• 4 = 16n

• 4 = 16/n

• 4 = 16 + n

• 4 = 16 - n

The sum of a number k and 5 is 11.

• 5k = 11

• 5 - k =11

• 5/k = 11

• 5 + k = 11

The difference of a number x and 2 is 7.

• x - 2 = 7

• x + 2 = 7

• 2x = 7

• 2/x = 7

7 times a number a is 42.

• 7a = 42

• 7 + a = 42

• 7/a = 42

• 7 - a = 42

6 is one-third of a number s

• 6 = 1/3 + s

• 6 = 1/3s

• 6 = 1/3 - s

A number z divided by 7 equals 4

• z + 7 = 4

• z - 7 = 4

• 7z = 4

• z/7 = 4

5 more than a number m is the same as 8

• m - 5 = 8

• m + 5 = 8

• 5m = 8

• m/5 = 8

Your friend writes the word sentence as an equation. Is your friend correct?

• Yes

• No

A crew is picking up chairs in the gymnasium after an event. After clearing 217 chairs from the gym floor, 36 chairs still remain. Write an equation you can use to find the number of chairs placed on the gym floor for the event.

• 217n = 36

• n - 217 = 36

• n + 217 = 36

• n/217 = 36

You earn 4070 points in level 1 of a video game and 2710 points in level 2. After level 3, your point total is 8180. Which equation can you NOT use to find the number of p points you scored in level 3.

• 4070 + 2710 + p = 8180

• 6780 + p = 8180

• 8180 + p = 6780

• 8180 - p = 6780