Billy had
710 as many beads as Opal. After Billy bought another 14 beads, he had 19 less beads than Opal. How many beads did Billy have at first?
| |
Billy |
Opal |
| Before |
7 u |
10 u |
| Change |
+ 14 |
|
| After |
7 u + 14 |
10 u |
Opal had 19 more beads than Billy in the end. So, if Billy had another 19 beads, he would have the same number of beads as Opal.
10 u = 7 u + 14 + 19
10 u - 7 u = 14 + 19
3 u = 33
1 u = 33 ÷ 3 = 11
Number of beads that Billy had at first
= 7 u
= 7 x 11
= 77
Answer: 77
