Variable Equations

Erin has 6 fewer vacation days than Sandra. If s represents the number of vacation days Erin has, which sentence represents he vacation days Erin has?

• 6 - s = ?

• s x 6 = ?

• s - 6 = ?

• 6 + s = ?

Find the value of x:

x + 3 = 7

• 4

• 10

• -4

• 7/3

Jordan needs to walk 6 more miles this week to reach his weekly goal of 21 miles. Which number sentence can be used to find n, the total number of miles that Jordan has walked so far this week?

• n = 6 + 21

• n + 6 = 21

• n =6 x 21

• n - 6 = 21

Which situation could be represented by the open sentence

15 -5 = t

• Sam is reading a book that has a total of 15 chapters. He reads 5 chapters each day. How many days will it take Sam to finish the book?

• Sam is reading a book that has a total of 15 chapters. He has already read 5 chapters. How many chapters of the book are left for Sam to read?

• Sam is reading a book that has a total of 15 chapters. This book has 6 chapters less than the book Stuart read last week. How many chapters were in the book Sam read?

• Sam is reading a book that has a total of 15 chapters. This is 5 times the number of chapters as the book Sam read last week. How many chapters were in the book Sam read last week?

Alexa had 9 parakeets. She gave 3 parakeets to Antonio. How many parakeets does Alexa have left? Which sentence can be represented?

• 9 - s = ?

• s - 9 = ?

• 9 + s = ?

• s x 9 = ?

Wayne has t trading cards. Kiera has 32 more trading cards than Wayne. Choose the expression that shows how many trading cards Kiera has.

• t + 32

• t - 32

• 32 - t

• 32 + t

Joey packed b boxes with 4 ornaments in each box. If there were 36 ornaments, what number sentence would be used to find out how many boxes Joey packed?

• b ÷ 36 = 4

• 36 x 4 = b

• 4 x b = 36

• b – 4 = 36

A clerk in the grocery store is stacking cans. If there are 17 cans on the bottom row and next row will have n fewer cans, which number sentence could be used to find the number of cans on the next row?

• 17 – n = ?

• n – 17 = ?

• 17 ÷ n = ?

• n ÷ 17 = ?

Tina has 5 more yellow flowers in her collection than blue flowers. If b represents the number of blue flowers in Tina's collection, which can be used o determine the number of yellow flowers in her collection?

• b ÷ 5 = ?

• b – 5 = ?

• b x 5 = ?

• b + 5 = ?