Sam has
37 as many marbles as Ethan. They have a total of 270 marbles. How many marbles must Ethan give to Sam so that they will have the same number of marbles?
|
Sam |
Ethan |
Total |
Before |
3 u |
7 u |
10 u |
Change |
+ ? |
- ? |
|
After |
135 |
135 |
270 |
Total number of marbles
= 3 u + 7 u
= 10 u
10 u = 270
1 u = 270 ÷ 10 = 27
Number of marbles that each of them has in the end
= 270 ÷ 2
= 135
Number of marbles that Sam has
= 3 u
= 3 x 27
= 81
Number of marbles that Ethan must give Sam
= 135 - 81
= 54
Answer(s): 54