2). Andrew's father is 4 times as old as him. Next year, their ages will total 42 years. How old is Andrew and his father now?
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Answer:
The correct answer is 6 and 24
Step-by-step explanation:
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Let x be the age of his son now, then the age of the father is 4x.
In 20 years,
The son's age = x + 20
The father's age = 4x + 20
As in 20 years the father will be twice as old as his son, we can set up an equation:
4x + 20 = 2(x + 20)
Solving the equation for x, we have
4x + 20 = 2x + 40
2x = 20
x = 10
So the age of his son now is 10, and the age of the the father now is 40.