# math

posted by .

3000 exercise books are arranged in 3 piles.The first pile has 10 more books than the second pile.The number of books in the second pile is twice the number of books in the third pile.How many books are there in the third pile?

• math -

Let x = # books in third pile, then second pile = 2x, and first pile = 2x + 10.

x + 2x + (2x+10) = 3000

Solve for x.

## Similar Questions

300 exercise books are arranged into 3 piles. The first pile has 10 more books than the second pile. The number of books in the second pile is twice the number of books in the third pile. How many books are there in the third pile?
2. ### 4th Grade Math Correction

PLEASE HELP.I am sorry. I posted the question wrong earlier this evening. Instead of 300 it should have read: 3000 exercise books are arranged into 3 piles. The first pile has 10 more number of books than the second pile. The number …
3. ### Math

A pile of 108 identical books has a mass of 30 kg. Find (a)the mass of 150 books and (b)the number of books that has a mass of 20 kg
4. ### math

A pile of 108 identical books has a mass of 30 kg. Find (a)the mass of 150 books and (b)the number of books that has a mass of 20 kg.
5. ### maths

16 similar writing pads and 24 similar jotter books are stacked in a pile. their total thickness is 14.4cm.Each writing pad is 3x as thick as each jotter book. what is the thickness of the pile of jotter books?
6. ### MATH HELP!!!!

3000 exercise books are arranged in 3 piles.the first pile has 10 more books than the second pile.the number of books in the second pile is twice the number of books in the third pile.how many books are in the third pile?
7. ### math

MEghan had 36 books in her locker. Some were library books, text books and the rest were telephone books. THe number of library books and phone books combined equals twice the number of text books. The number of text books and telephone …
8. ### PrimaryMatheMatics 4A textbook

3000 Exercise books are arranged into 3 piles.The first pile has 10 more books than the second pile.The Number of books in the second pile is twice the number of books in the third pile.How Many books are there in the third pile?
9. ### Math

400 exercise books are arranged into 3 piles.The first has 5 more books than the 2nd pile.The number of books in the second pile is twice the number of books in the third pile.How many books are there in the third pile?
10. ### Math

there are 680 coins divided into 3 piles. The second pile has three times as many coins as the first. The third pile has 50 more coins than the second pile. Solve This problem using a tape diagram.

More Similar Questions