Ages Four Years Ago

Peter and Paul are 26 years old together. Four years ago, Peter was twice as old as Paul. How old is Peter? And how much for Paul?

Final Answer:

a =  16
b =  10

Step-by-step explanation:


a+b=26
a-4 = 2(b-4)

a+b=26
a-4 = 2·(b-4)

a+b = 26
a-2b = -4

Row 2 - Row 1 → Row 2
a+b = 26
-3b = -30


b = -30/-3 = 10
a = 26-b = 26-10 = 16

a = 16
b = 10

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You need to know the following knowledge to solve this word math problem:

algebranumbersUnits of physical quantitiesGrade of the word problem

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