SOLUTION: Ten years from now Sam will be twice as old as she was three years ago. How many years old is Sam now?

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Question 1055444: Ten years from now Sam will be twice as old as she was three years ago. How many years old is Sam now?
Answer by ikleyn(52776) About Me  (Show Source):
You can put this solution on YOUR website!
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Ten years from now Sam will be twice as old as she was three years ago. How many years old is Sam now?
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S + 10 = 2*(S-3),

S + 10 = 2S - 6,

10 + 6 = 2S - S,

S = 16.

Answer.  16 years.

He or she?

There is a bunch of lessons on age word problems
    - Age problems and their solutions
    - A fresh formulation of a traditional age problem
    - Really intricate age word problem
    - Selected age word problems from the archive
in this site.

Read them and become an expert in solving age problems.

Also, you have this free of charge online textbook in ALGEBRA-I in this site
    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this online textbook under the topic "Age word problems".