SOLUTION: Liza is 25 years younger than her mother. After 4 years, her mother's age will be twice as old as her. How old are they?

Question 1050807: Liza is 25 years younger than her mother. After 4 years, her mother's age will be twice as old as her. How old are they?
Answer by advanced_Learner(501) (Show Source): You can put this solution on YOUR website!
L=M-25
2(L+4)=M+4
2L+4=M

Solved by pluggable solver: SOLVE linear system by SUBSTITUTION

Solve:
We'll use substitution. After moving -1*l to the right, we get:
, or . Substitute that
into another equation:
and simplify: So, we know that l=21. Since , m=46.

Answer: .

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