SOLUTION: nancy is 10 years older than lisa.in two years she will be twice as old as lisa. find their present ages.

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Question 359368: nancy is 10 years older than lisa.in two years she will be twice as old as lisa. find their present ages.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.N=10%2BL
In two years, Nancy will be N%2B2, Lisa will be L%2B2
N%2B2=2%28L%2B2%29
Substitute from eq. 1,
10%2BL%2B2=2L%2B4
L%2B12=2L%2B4
highlight%28L=8%29
Then from eq. 1,
N=10%2B8
highlight%28N=18%29
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.
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Nancy is 18, Lisa is 8.