Will has 204 marbles and Fabian has 473 marbles. How many marbles must Fabian give to Will so that Will will have 109 less marbles than Fabian?
| |
Will |
Fabian |
Total |
| Before |
204 |
473 |
677 |
| Change |
+ ? |
- ? |
|
| After |
1 u |
1 u + 109 |
677 |
The total number of marbles remains unchanged after Fabian gives to Will.
Total number of marbles
= 204 + 473
= 677
Total number of marbles in the end
= 1 u + 1 u + 109
= 2 u + 109
2 u + 109 = 677
2 u = 677 - 109
2 u = 568
1 u = 568 ÷ 2 = 284
Number of marbles that Fabian must give to Will
= 284 - 204
= 80
Answer(s): 80
