SOLUTION: Mike is three times as old as his little sister mary. in four years, he will be twice as old as mary. how old is mary?
Algebra.Com
Question 1074147: Mike is three times as old as his little sister mary. in four years, he will be twice as old as mary. how old is mary?
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
Let m represent marys' age. Then Mike would be 3m. So:
3m+4=2(m+4)
3m+4=2m+8
m=4
Mary is 4; Mike is 12. ☺☺☺☺
RELATED QUESTIONS
mike is three times as old as his little sister, Mary. in 4 years, he will be twice as... (answered by Alan3354)
mike is three times as old as his little sister mary. in four years hell be twice as old... (answered by Alan3354)
Got another one. I swear A+ hates me.
Mike is three times as old as his little sister, (answered by stanbon)
Mary is twice as old as Rachel will be in seven years. Four years ago, Mary was four... (answered by ankor@dixie-net.com)
Kevin is 16 years older than his sister Mary. In 10 years, he will be twice as old as... (answered by Alan3354)
Ray is 21 years older than his sister Mary. In 7 years, he will be twice as old as Mary.... (answered by Alan3354)
Ray is 22 years older than his sister Mary. In 12 years, he will be twice as old as... (answered by ikleyn)
Lucy is four times as old as Mary. In twenty years Lucy will be three times as old as... (answered by sofiyac)
Mary is 3 times as old as her brother John. In 5 years, Mary will be twice as old as... (answered by richwmiller)