Aunt Tiffany is now 2 times as old as Sabrina. 20 years ago, Aunt Tiffany was 7 times as old as Sabrina. How old will Aunt Tiffany be 7 years from now?
| |
Aunt Tiffany |
Sabrina |
Difference |
| Before |
7 u |
1 u |
6 u |
| Change |
+ 20 |
+ 20 |
|
| After |
2x6 =
12 u |
1x6 =
6 u |
1x6 =
6 u |
Before
Aunt Tiffany's age = 7 u
Sabrina's age = 1 u
After
Aunt Tiffany's age = 12 u
Sabrina's age = 6 u
The age difference between Aunt Tiffany and Sabrina remains the same.
LCM of 6 and 1 is 6.
12 u - 7 u = 20
5 u = 20
1 u = 20 ÷ 5 = 4
Aunt Tiffany's age now
= 12 u
= 12 x 4
= 48
Aunt Tiffany's age 7 years from now
= 48 + 7
= 55
Answer(s): 55
