Models for One Step Equations

13 + y = 20

• y = 13

• y = 33

• y = 7

• y = 20/13

n - 4 = 12

• n = 16

• n = 8

• n = 4/12

• n = 12/4

6 y = 42

• y = 7

• y = 6

• y = 36

• y = 48

y/3 = 8

• y = 3/8

• y = 8/3

• y = 24

• y = 83

1/2 n = 10

• n = 10

• n = 5

• n = 20

• n = 12

Which choice describes the step needed to isolate the variable? (Tap outside of the gray box to see the equation.)

• Divide both sides by 11

• Multiply both sides by 11.

• Add 11 to both sides.

• Subtract 11 to both sides.

Solve the equation
3x = 27. 

• x = 24

• x = 81

• x = 9

Which choice models this situation? Marcus needs to sell 25 tickets to a fundraiser by Friday. So far, he has sold 9 tickets. How many tickets does he still need to sell?

• t - 9 = 25

• t + 9 = 25

• 9t = 25

• t/9 = 25

Which choice models this situation? Last week, Tina worked 35 hours in 5 days. She worked the same number of hours each day. How many hours did she work each day?

• h - 5 = 35

• h + 5 = 35

• 5h = 35

• h/5 = 35

Becky is preparing for her younger sister's birthday party. She splits a jar of lollilops evenly among 6 goody bags. Each bag ends up with 4 lollipops. Which equation can you use to find the number of lollipops n in the jar?

• n/6 = 4

• n - 4 = 6

• 4n = 6

• n + 6 = 4