David and Valen both received an allowance from their father. David initially received 35% of the money. He then gave Valen $30, and was left with
13 as much money as Valen. What was the total amount of money given to the two boys?
|
David |
Valen |
Total |
Before |
7x1 = 7 u |
13x1 = 13 u |
20x1 = 20 u |
Change |
- 30 |
+ 30 |
|
After |
1x5 = 5 u |
3x5 = 15 u |
4x5 = 20 u |
The total amount of money remains the same.
35% =
35100 =
720Amount that David gave to Valen
= 7 u - 5 u
= 2 u
2 u = 30
1 u = 30 ÷ 2 = 15
Total amount of money given to the two boys
= 20 u
= 20 x 15
= $300
Answer(s): $300