A and B are 3 years and 2 years old respectively. Their father is 40 years. After how many years, fathers age would be twice of combined age of A and B?
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Answer: 10 years
Step-by-step explanation:
Let number of years be x.
2{ (x+3)+(x+2) } = 40+x
2(2x+5) = 40+x
4x+10=40+x
3x=30
x = 30/3 =10
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