Asher had
310 as many marbles as Sarah. After Asher bought another 12 marbles, he had 16 less marbles than Sarah. How many marbles did Asher have at first?
| |
Asher |
Sarah |
| Before |
3 u |
10 u |
| Change |
+ 12 |
|
| After |
3 u + 12 |
10 u |
Sarah had 16 more marbles than Asher in the end. So, if Asher had another 16 marbles, he would have the same number of marbles as Sarah.
10 u = 3 u + 12 + 16
10 u - 3 u = 12 + 16
7 u = 28
1 u = 28 ÷ 7 = 4
Number of marbles that Asher had at first
= 3 u
= 3 x 4
= 12
Answer: 12
