You can
put this solution on YOUR website!osa is 18 years old and Arthur is 24 years old. How many years ago was Arthur three times as old as Rosa?
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Let x = number of years ago that this statement was true
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A's age x yrs ago = 3 times R's age x yrs ago
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24 - x = 3(18 - x)
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24 - x = 54 - 3x; multiplied what's inside the brackets
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-x + 3x = 54 - 24
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2x = 30
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x = 15 yrs ago. You can check and see if this is true:
