You can
put this solution on YOUR website!Let g = girl's age
Let m = mother's age
:
Write an equation for each statement.
:
"A girl is 1/3 her mothers age."
g =
m
:
"The differences in their ages is 20 years."
m - g = 20
From the 1st equation, replace g with
m
m -
m = 20
m = 20
multiply both sides by 3, results:
2m = 3*20
2m = 60
m =
m = 30 is Mom's age
:
I'll let you find the girl's age
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