Ivan had
79 as many marbles as Nicole. After Ivan bought another 22 marbles, he had 10 less marbles than Nicole. How many marbles did Ivan have at first?
|
Ivan |
Nicole |
Before |
7 u |
9 u |
Change |
+ 22 |
|
After |
7 u + 22 |
9 u |
Nicole had 10 more marbles than Ivan in the end. So, if Ivan had another 10 marbles, he would have the same number of marbles as Nicole.
9 u = 7 u + 22 + 10
9 u - 7 u = 22 + 10
2 u = 32
1 u = 32 ÷ 2 = 16
Number of marbles that Ivan had at first
= 7 u
= 7 x 16
= 112
Answer: 112