Ryan has 319 chocolate bars and Eric has 516 chocolate bars. How many chocolate bars must Eric give to Ryan so that Ryan will have 47 more chocolate bars than Eric?
| |
Ryan |
Eric |
Total |
| Before |
319 |
516 |
835 |
| Change |
+ ? |
- ? |
|
| After |
1 u + 47 |
1 u |
835 |
The total number of chocolate bars remains unchanged after Eric gives to Ryan.
Total number of chocolate bars
= 319 + 516
= 835
Total number of chocolate bars in the end
= 1 u + 1 u + 47
= 2 u + 47
2 u + 47 = 835
2 u = 835 - 47
2 u = 788
1 u = 788 ÷ 2 = 394
Number of chocolate bars that Eric must give to Ryan
= 516 - 394
= 122
Answer(s): 122
