kelsis mom, sue is eight times as old as kelsi. in 10 years, sue will be three times as old as kelsi. how old are kelsi and sue now?
Mathematics · College · Thu Feb 04 2021
Answered on
Let the age of Kelsis be x years
Then, age of mom will be 8x
After 10 years :
Kelsis' age = (x + 10) yr
Mom's age = (8x + 10) yr
According to question:
8x + 10 = 3(x + 10)
8x + 10 = 3x + 30
Transposing 3x and 10 to other side, we get
8x - 3x = 30 - 10
5x = 20
Dividing both sides by 5, we get
5x/5 = 20/5
x = 4
Mom's age = 8x
= 8 × 4
= 32 years
Thus, kesis and her mom's ages are 4 years and 32 years respectively.