IXL | Solve one-step addition and subtraction equations: word problems

Darell sets a savings goal each month. After the first two weeks of December, Darell had saved $45.18. To reach his goal that month, he still needed to save $29.82 more.

Let

represent Darell's savings goal for December. Which equation models the problem?

45.18

29.82

–

45.18

29.82

Solve this equation to find Darell's savings goal for December.

ref_doc_title.

Learn with an example

question

At the Wild West amusement park, Florence's favorite ride is the Blazing Bullet roller coaster. The roller coaster normally has a lot of seats to choose from, but Florence noticed that 12 of the seats are now reserved for season pass holders. There are 42 seats remaining for people without season passes.

Let

represent the total number of seats on the Blazing Bullet roller coaster. Which equation models the problem?

–

Solve this equation to find the total number of seats on the Blazing Bullet roller coaster.

seats

key idea

If you add or subtract the same number on both sides of an equation, the two sides will still be equal.

solution

Start by listing the information given in the problem:

There are
s
total seats on the Blazing Bullet roller coaster.
There are 12 reserved seats for season pass holders.
There are 42 seats remaining.

This equation models the problem.

s	−	12	=	42

total number of seats		reserved seats		remaining seats

Use inverse operations to solve for

Since this equation shows subtracting

12,

you should add 12 to both sides to solve.

–

There are 54 seats on the Blazing Bullet roller coaster.

Looking for more? Try these:

Lesson: Solving equations

$Confetti$

Excellent!

Now entering the Challenge Zone—are you ready?

Teacher tools

Work it out

Not feeling ready yet? These can help:

AA.11Solve one-step addition and subtraction equations with decimals and fractions

AA.16Write a one-step equation: word problems

Lesson: Solving equations

Excellent! You got that right!

Jumping to level 1 of 1

Excellent!