# Barbie is thinking of a number. Twenty less than one-third of the number is 72. What is Barbie's number?

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I know that this is an easy equation but I keep on ending up with 236 as my answer. Help? Please include work on the problem

I know that this is an easy equation but I keep on ending up with 236 as my answer. Help? Please include work on the problem

##### 4 Answers

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All right. Let's write an equation.

Using

We add 20 on both sides.

=>

=>

=>

=>

That is our answer!

I think that you did something like this:

=>

This would not be true because when you multiply both sides by 3, you would get:

=>

=>

We still get the same answer.

#### Answer

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Describe your changes (optional) 200

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Barbie's number is

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Describe your changes (optional) 200

#### Answer:

Let the number Barbie is thinking of be

solve for

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add 20 to each side

multiply both sides by 3

#### Answer

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#### Explanation

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Describe your changes (optional) 200

#### Answer:

#### Explanation:

Let the number be

Then,

or,

or,

or,

Describe your changes (optional) 200