SOLUTION: My question is: Marys father is 4 times as old as Mary and 5 years ago he was 7 times as old. How old is each now?
Algebra.Com
Question 192789: My question is: Marys father is 4 times as old as Mary and 5 years ago he was 7 times as old. How old is each now?
Answer by Mathtut(3670) (Show Source): You can put this solution on YOUR website!
let m and f be ages of mary and mary's father
:
f=4m..........eq 1
f-5=7(m-5)....eq 2
:
take f's value from eq 1 and plug it into eq 2
:
4m-5=7m-35
:
3m=30
:
m=10
:
f=4m=4(10)=40
:
RELATED QUESTIONS
Mary’s father is four times as old as Mary. Five years ago, he was seven times as old.... (answered by josmiceli)
Mary's father is four times as old as Mary. Five years ago, he was seven times as old.... (answered by Cromlix)
Will's Father is five times as old as Will now. Two years ago, he was 7 times as old as... (answered by stanbon,scott8148)
Sarah's father is four times as old as mary. Five years ago he was seven times as old.... (answered by stanbon)
Melinda's father Lester is 3 times as old as Melinda. Seven years ago, he was 4 times as... (answered by stanbon)
Lyn's father is 4 times as old as her. Five years ago the father was 7 times as old as... (answered by ikleyn)
Lyns father is 4 times as old as Lyn. Five years ago the father was 7 times as old as... (answered by josgarithmetic,richwmiller)
Lyn's father is 4 times as old as Lyn. Five years ago the father was 7 times as old as... (answered by MathLover1)
gloria is 4 times as old as theotis. three years ago, she was 7 times as old as he... (answered by Stitch)