SOLUTION: need help Bobbys grandfather is 6 years older than 7 times bobbys age.the difference in their ages is 72years.how old is bobby and his grandfather

Question 445649: need help Bobbys grandfather is 6 years older than 7 times bobbys age.the difference in their ages is 72years.how old is bobby and his grandfather
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Bobbys grandfather is 6 years older than 7 times bobbys age.the difference in their ages is 72years.how old is bobby and his grandfather
--------------------
Equations:
G = 7B+6
G - B = 72
------------------
Substitute for "G" and solve for "B":
7B+6 - B = 72
---
6B = 66
---
B = 11 yrs old (Bobby's age now)
----
Solve for "G":
G = 7B+6
G = 7*11+6 = 77+6 = 83 yrs old (Grandpa's age now)
======================================================
Cheers,
Stan H.
===============
RELATED QUESTIONS
Ross is 6 years older than twice his sister Holly's age. The difference in their ages is (answered by harpazo)

Bill is 8 times older than Sally the difference in their ages is 7 years; how old is Bill (answered by robertb)

Kim's sister is five years older than three times kims age. The sum of their ages is 13.... (answered by erica65404)

Julio's grandfather is 3 times his age. the total sum of their ages is 92. how old is... (answered by stanbon)

[ana is 5 years older than kristine. in 10 years, kristine's age is 24 more than the... (answered by TimothyLamb)

Ross is six years older than twice his sister Holly's age. The difference in their ages... (answered by stanbon)

Ross is six years older than twice his sister Holly's age. The difference in their ages... (answered by lwsshak3)

John is 6 years older than Kathy. Together, their ages equal 4 times Kathy's age. How old (answered by Fombitz)

Please help me solve this word problem: Kayla is 9 years older than twice Hannah's... (answered by macston)