Zoron is ten years older than his sister. In 3 years, he will be twice as old as she will be then. How old are they now?

Question

How do i solve this problem and what are the steps?? SOMEONE PLS HELP

Answer 1

sister's age=s

Zoron's age=s+10

in 3 years...

s+3 and s+10+3 for the ages

s+10+3=2(s+3)

s+13=2s+6

13-6=2s-s

s=7 years for the sister

10+7=17 years for Zoron

in 3 years...

7+3=10 and 17+3=20 and 20=2*10