Luis had
25 as many marbles as Emma. After Luis gave away 42 marbles, he had 93 less marbles than Emma. How many marbles did Emma have?
| |
Luis |
Emma |
| Before |
2 u |
5 u |
| Change |
- 42 |
|
| After |
2 u - 42 |
5 u |
Emma had 93 more marbles than Luis in the end. So, if Luis had another 93 marbles, he would have the same number of marbles as Emma.
5 u = 2 u - 42 + 93
5 u - 2 u = 93 - 42
3 u = 51
1 u = 51 ÷ 3 = 17
Number of marbles that Emma had at first
= 5 u
= 5 x 17
= 85
Answer: 85
