92.5k views
1 vote
Five years ago I was 5 times older than my son. In 8 years’ time I will be 3 times older than my son. How old am I today?

2 Answers

2 votes

Answer:

5 ve 8 in katları olmalı

Explanation:

Bu yüzden muhtemelen 40

Cevap:40

Im so sorry but my english level is a2 I from turkey

User GrayFox
by
5.7k points
4 votes

Let x = Parent's age now y = son's age now

Then, x-5 = parent's age five years ago

y-5 = son's age five years ago

So, x-5 = 5(y-5)

Simplify to get x - 5y = -20

Parent's age 8 years from now = x+8

Son's age 8 years from now = y+8

So, x+8 = 3(y+8)

Simplifying, we have x - 3y = 16

We have the system of equations: x - 5y = -20

x - 3y = 16

Subtract the equations to obtain -2y = -36

y = 18

x = 70

Parent is 70 years old and the son is 18 years old.

User Oz
by
5.9k points