Sam had some marbles at first. After he bought another 76 marbles, he had five times as many marbles as before. How many marbles did Sam have at first?
|
Marbles |
Before |
1 u |
Change |
+ 76 |
After |
1 u + 76 = 5 u |
Number of marbles after he bought = 1 u + 76
Number of marbles that is five times as many marbles as before = 5 x 1 u = 5 u
5 u = 1 u + 76
5 u - 1 u = 76
4 u = 76
1 u = 76 ÷ 4 = 19
Number of stickers that Kim had at first
= 1 u
= 19
Answer(s): 19