Question 1017052
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P=Peter's age; J=John's age
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A). 
P-J=(5x-4)-(2x+1)=3x-5 . 
ANSWER A): Peter is 3x-5 older than John.
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B). 
10=3x-5
15=3x
5=x
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I). 
ANSWER I): Value of x is 5.
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II).
P=5x-4=5(5)-4=25-4=21 . 
ANSWER IIA). Peter is 21 years old.
J=2x+1=2(5)+1=10+1=11 . 
ANSWER IIB). John is 11 years old.
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