SOLUTION: The sum of the ages of Dylan and Noelle is 80 years. 10 years ago, Dylan's age was 3 times Noelle's age. How old is Dylan now?
Algebra.Com
Question 1177439: The sum of the ages of Dylan and Noelle is 80 years. 10 years ago, Dylan's age was 3 times Noelle's age. How old is Dylan now?
Found 4 solutions by Boreal, mananth, greenestamps, josgarithmetic:
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
D+N=80
(D-10)=3(N-10)
D-10=3N-30
D=3N-20
so 4N-20=80
N=25
D=55
10 years ago it was 15 and 45 for N and D respectively.
Dylan is 55 now.
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
The sum of the ages of Dylan and Noelle is 80 years.
D+N =80
multiply by 3
3D +3N =240----------------(1)
10 years ago, Dylan's age was 3 times Noelle's age.?
D-10= 3(N-10)
D-10 =3N -30
D-3N =-20 --------------(2)
Add 1 and 2
4d =220
D= 55
dylan is 55 years now
Answer by greenestamps(13200) (Show Source): You can put this solution on YOUR website!
There are an endless number of different ways to set up this problem for solving. With some experience, you can learn how to set up problems to make the work of solving them as easy as possible.
Given that Dylan 10 years ago was 3 times as old as Nicole, I would set up the problem like this:
Let x = Nicole's age 10 years ago
Then 3x = Dylan's age 10 years ago
The sum of their current ages is 80, so 10 years ago that sum was 60.
Dylan's age 10 years ago was 3x=45, so his age now is 55.
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
for ages d Dylan and n Noelle, the description very literally is:
Question just asks for d.
Starting approaches to solve can vary.
RELATED QUESTIONS
The sum od Dylan's and Krista's ages is 25. In 12 years, Dylan will be seven years older... (answered by Mathtut)
julia is 8 years older then dylan. sofia is four years youner than dylan. the sum of... (answered by ankor@dixie-net.com)
In the year 2021, Dylan is four years older than his sister Anna, Anna is four times as... (answered by mananth)
the age of noelle's dad is six less than three times noelle’s age. the sum of their ages... (answered by josgarithmetic,ikleyn)
Conner is 30 years younger than Noelle. 6 years ago, Noelle's age was 3 times Conner's... (answered by JulietG)
Noelle is 5 years younger than her sister Aya. The difference of the square of Aya’s... (answered by josgarithmetic)
In 3 years, Dylan will be twice as old as he was last year. How old is Dylan... (answered by jorel1380)
1. Andy, Randy, and Sandy Jones are brothers. Andy, the oldest, is the only brother whose (answered by ankor@dixie-net.com)
Connor's school is due west of his house and due south of his friend Dylan's house. The... (answered by MathLover1)