Vincent had
58 the number of marbles that Cole had at first. After Cole gave Vincent 70 of his marbles, Vincent had
45 the number of marbles that Cole had. How many marbles did Vincent have at first?
|
Vincent |
Cole |
Total |
Before |
5x9 = 45 u |
8x9 = 72 u |
13x9 = 117 u |
Change |
+ 7 u |
- 7 u |
|
After |
4x13 = 52 u |
5x13 = 65 u |
9x13 = 117 u |
The total number of marbles that Vincent and Cole had at first and in the end remains unchanged. Make the total number of marbles the same. LCM of 13 and 9 is 117.
Number of marbles that Cole gave Vincent
= 52 u - 45 u
= 7 u
7 u = 70
1 u = 70 ÷ 7 = 10
Number of marbles that Vincent had at first
= 45 u
= 45 x 10
= 450
Answer(s): 450