Barbie is thinking of a number. Twenty less than one-third of the number is 72. What is Barbie's number?
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
Explanation:
Let the number be
Then,
or,
or,
or,
Let the number Barbie is thinking of be
solve for
Explanation:
add 20 to each side
multiply both sides by 3
Explanation:
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.
Barbie's number is