When I was 4 years old my brother was half of my age. Now I’m 44, how old is my brother?
Let your age be a and your brother’s age be b when a=4
a-b= always a constant
When a=4, b=4/2=2
a-b=4–2=2=constant
Therefore,
44- your brother’s age= 2
Your brother’s age = 42 now
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