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SOLUTION: 8 years ago,melanie waz half as old as she will be in 3 years. How old is she presently? please help!!!!!!!!!!!!!!!!!!!!
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Question 174419
:
8 years ago,melanie waz half as old as she will be in 3 years. How old is she presently? please help!!!!!!!!!!!!!!!!!!!!
Answer by
jim_thompson5910(33401)
(
Show Source
):
You can
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Let x=Melanie's age now, y=Melanie's age 8 years ago, and z=Melanie's age in 3 years
So this means that
and
(by definition)
Since "8 years ago,melanie waz half as old as she will be in 3 years", this tells us that
Start with the given equation.
Plug in
and
Multiply both sides by 2.
Distribute.
Add
to both sides.
Subtract
from both sides.
Combine like terms on the left side.
Combine like terms on the right side.
----------------------------------------------------------------------
Answer:
So the answer is
which means that she is currently 19 years old