SOLUTION: The sum of Robin's age and Gabby's age is 45. Seven years ago, Robin was 16 yrs. more than one-half as old as Gabby was then. how old is gabby?
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Question 1111668: The sum of Robin's age and Gabby's age is 45. Seven years ago, Robin was 16 yrs. more than one-half as old as Gabby was then. how old is gabby? Found 2 solutions by ankor@dixie-net.com, TeachMath:Answer by ankor@dixie-net.com(22740) (Show Source):
You can put this solution on YOUR website! The sum of Robin's age and Gabby's age is 45.
r + g = 45
g = 45 - r
Seven years ago, Robin was 16 yrs. more than one-half as old as Gabby was then.
r - 7 = (g-7) + 16
r = (g-7) + 16 +7
r = (g-7) + 23
get rid of the fraction, mult by 2
2r = g - 7 + 46
2r = g + 39
2r = 45 - r + 39
2r + r = 45 + 39
3r = 84
r = 84/3
r = 28 yr is R's age
:
I'll let you find G's age, check them in the statement
"Seven years ago, Robin was 16 yrs. more than one-half as old as Gabby was then"
You can put this solution on YOUR website! Let Gabby’s age be G
Then Robin’s is: 45 – G
We then get: 45 – G – 7 = ½(G – 7) + 16
Solve this to get Gabby's age as 17.
We need to focus on GABBY's age, and that's what we focus primarily on.
This is how simple this is!
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