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?
Algebra.Com
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"
how old is gabby?
Answer by TeachMath(96) (Show Source): 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!
RELATED QUESTIONS
Using only one variable, The sum of Robin and Bruno's age is 45. Seven years ago, Robin... (answered by addingup,MathTherapy)
The sum of Robin and Bruno's age is 45. Seven years ago, Robin was 16 years more than... (answered by josgarithmetic)
the sum of robin's age and Bruno's age is 45. Seven years ago, robin was 16 years more... (answered by MathTherapy)
" The sum of Allan and Ben's age is 45. Seven years ago, Allan was 16 years more than... (answered by Edwin McCravy)
Today, Gabby is 1/4 of the age she was 6 years ago. How old is... (answered by stanbon,MathTherapy)
"The sum of Robin's age and Bruno's age is 45. 7 yrs. ago, Robin was 16 yrs. more than... (answered by MathTherapy)
Robin is twice as old as Jay, Robin is 11 years older than Ann. The total of the ages... (answered by ikleyn,josgarithmetic)
Christian is twice as old as Taskie while Dark is 24 years younger than Christian. If... (answered by josgarithmetic,MathTherapy)
Adam is 3 times as old as Cynthia and Fred is 16 yrs. younger than Adam. One year ago,... (answered by ankor@dixie-net.com)