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?
OOPS,
I read that as 300, should have been 3000
easy to fix
x+2x+2x+10 = 3000
5x = 2990
x = 598
I would start with defining the
number of books in the third pile is x
then the number of books in the 2nd pile is 2x
and the first pile is then 2x+10
(I just translated the English to Math)
their sum is 300
x + 2x + 2x+10 = 300
5x = 290
x = 58
Third pile has 58 books
(2nd has 116 , the first has 126
check: 58+116+126 = 300)
It is 1495
How ?
Can you do this with +×÷-
To find the number of books in the third pile, follow these steps:
1. Let's assume the number of books in the third pile as 'x'.
2. According to the given information, the second pile has twice the number of books in the third pile. So, the second pile has 2x books.
3. The first pile has 10 more books than the second pile. Therefore, the first pile has (2x + 10) books.
4. The total number of books in all three piles is given as 3000. So, we can form the equation: x + 2x + (2x + 10) = 3000.
5. Simplifying the equation, we get 5x + 10 = 3000.
6. Now, subtracting 10 from both sides, we have 5x = 2990.
7. Dividing both sides by 5, we get x ≈ 598.
Therefore, there are approximately 598 books in the third pile.
It is easy the easy way hard the hard way do not make fun of my last name because it actualy means noble man the answer is ::::::;;:;;::::::::::::::::::::::
1495
Dunno
first look at what you know:
1) the TOTAL number of books IS 300
this tells you ADD
the answer will be 300
2) there are 3 piles
this tells you you will add
3 things
What do you NOT know?
the number of books in the
third pile
use the letter "x" for this
now try to put your problem together
pile 1 pile 2 pile 3
+ + x = 300
see if you can figure it out now.