SOLUTION: Can you please help me with this problem. I am really struggling on how to go about completing it: Next year Peter will be twice as old as his sister will be. She is three years yo

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Question 232559: Can you please help me with this problem. I am really struggling on how to go about completing it: Next year Peter will be twice as old as his sister will be. She is three years younger than he. How old is each one now?
I have this done so far. p+1= 2s and S=p-3
I am unsure on what to do next.
Could you please assist me with this problem?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Next year Peter will be twice as old as his sister will be. She is three years younger than he. How old is each one now?
I have this done so far. p+1= 2s and S=p-3
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s = p-3
p+1 = 2(s+1) You had 2 times s, not s+1
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p+1 = 2s+2
Sub for s into the eqn above
p+1 = 2(p-3) + 2
p+1 = 2p-6 + 2
P+1 = 2P-4
P = 5
S = 2