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Home Q & A Board Science-Related Homework Help Mathematics
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flappunctual flappunctual
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7 years ago
One-third of lexie's age is 4 years more than one-fifth of this age. Lexie's sister is five years younger than her. how old is Lexie's sister?
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#1
7 years ago
lets's suppose that lexie's age is X. One-third of lexie's age is 4 years more than one-fifth of this age, so we can make an equation:
"(1/3) X - 4 = (1/5) X, and then we get X= 30(by multiplying 15 both side of equation, we get 5X - 60 = 3X, so 2X = 60) Lexie is 30 years old.  His sister is 5 years younger, so she is 25.
flappunctual Author
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#2
7 years ago
Thank you Grinning Face
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