Question 1151780: At present, Pedro's age is 25% of his father age. Twenty years from now, Pedro's age will be 50% of his father's age. How old are they? Answer by rothauserc(4718) (Show Source):
You can put this solution on YOUR website! Let P be Pedro's age and F be his father's age, then
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P = F/4
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(P +20) = (F +20)/2
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substitute for P in the second equation
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(F/4 +20) = (F +20)/2
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multiply both sides of = by 4
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F +80 = 2F +40
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F = 40
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P = F/4 = 40/4 = 10
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Pedro is 10 years old and Pedro's father is 40 years old
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