One and Two Step Equation Models

Pairs of operations that undo each other

• inverse operations

• solution

• inequality

Which choice models this situation? Jack needed new pencils for school today. He took 6 pencils from a new box of pencils. If there are 18 pencils left in the box, how many pencils were in the brand new box?

• p - 6 = 18

• p + 6 = 18

• 6p = 18

• p/6 = 18

Which choice models this situation? Lisa finished a race in 58 seconds. This was 4 seconds faster than her best practice time. What was Lindsey's best practice time?

• t + 4 = 58

• t - 4 = 58

• 4t = 58

• t/4 = 58

Karina played two softball games last week.  She had a total of 9 hits.  She had 4 hits in the first game.  Write an equation to determine how many hits she got in the second game.

• 9 - 4 = h

• h + 4 = 9

• 4h = 9

• h + 9 = 4

After 4 students joined a class, the class has 32 students. Which equation can be used to find n, the number of students in the class before the new 4 students joined?

• n - 4 = 32

• 4n = 32

• n + 4 = 32

• F

• G

• H

• J

What value of x makes this equation true?

• -10

• 10

• -190

• 190

What is the solution to the following equation?

• x = 8

• x = 16

• x = 4

• x = 6

Find the solution of the following equation.

• x = 5

• x = 3

• x = 7

• x = 10

Sergio got a paycheck for $74.80 for 10 hours of work. Which equation can be used to find x, the amount he was paid per hour?

• x + 10 = 74.80

• x − 80 = 74.80

• 10x = 74.80