SOLUTION: In 5 years time, Simon will be twice the age that his brother Peter is now. If Peter is 4 years old, how old is Simon now?

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Question 1152946: In 5 years time, Simon will be twice the age that his brother Peter is now. If Peter is 4 years old, how old is Simon now?
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
s, Simon
p, Peter

system%28s%2B5=2p%2Cp=4%29

s=2p-5
s=2%2A4-5
highlight%28s=3%29

Answer by ikleyn(52787) About Me  (Show Source):
You can put this solution on YOUR website!
.

This problem is not about Algebra. It is about arithmetic. 


    If Peter is 4 years now, twice his age is 8 years.


    Hence, In 5 years, Simon will be 8 years old.


    It means that now Simon is 8-5 = 3 years old.

You don't need to use equation to solve such simple, elementary problem (!)

It is, probably, a second grade's level problem . . .