Barbara bought four times as many cupcakes as Rael. After Barbara ate 5 cupcakes, she had 10 more cupcakes than Rael. How many cupcakes did they buy altogether?
| |
Barbara |
Rael |
Total |
| Before |
4 u |
1 u |
5 u |
| Change |
- 5 |
|
|
| After |
4 u - 5 |
1 u |
|
The number of cupcakes that Rael had remains unchanged.
If Rael had another 10 cupcakes in the end, the number of cupcakes that Barbara and Rael had would be the same.
4 u - 5 = 1 u + 10
4 u - 1 u = 10 + 5
3 u = 15
1 u = 15 ÷ 3 = 5
Total number of cupcakes
= 4 u + 1 u
= 5 u
= 5 x 5
= 25
Answer(s): 25
