Asked by Ella
                Peter is three times as old as Sue, who is four years older than Joe. In 20 years, Peter will be twice as old as Joe. How old is Peter now?
            
            
        Answers
                    Answered by
            Steve
            
    p=3s
s=j+4
p+20 = 2(j+20)
Now just solve for p.
    
s=j+4
p+20 = 2(j+20)
Now just solve for p.
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