SOLUTION: Michael is 15 years older than his brother Rafael. However, y years ago Michael was twice as old as Rafael. If Rafael is now x years old and x > y, what is the value of x-y?
Algebra.Com
Question 713078: Michael is 15 years older than his brother Rafael. However, y years ago Michael was twice as old as Rafael. If Rafael is now x years old and x > y, what is the value of x-y?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Michael is 15 years older than his brother Rafael.
However, y years ago Michael was twice as old as Rafael.
If Rafael is now x years old and x > y, what is the value of x-y?
:
" Michael is 15 years older than his brother Rafael." Rafael is x
m = x + 15
:
"y years ago Michael was twice as old as Rafael."
m - y = 2(x - y)
m - y = 2x - 2y
m = 2x - 2y + y
m = 2x - y
Replace m with (x+15)
x + 15 = 2x - y
15 = 2x - x - y
15 = x - y
RELATED QUESTIONS
Robert is 15 years older than his brother Stan. However, "y" years ago, Robert was as... (answered by Edwin McCravy)
Ning is 8 years younger than her brother Michael. Twenty-eight years ago, she was half as (answered by josgarithmetic)
Brendan is 4 years older than michael. 17 years ago Brendan was 3 times as old as... (answered by Fombitz)
michael is 4 years older than tom. 5 years ago michael was twice toms age how old is tom... (answered by ankor@dixie-net.com)
Michael is 4 years older than Tom. 5 years ago, Michael was twice tom's age? How old is... (answered by checkley77)
Michael is 3 years older than tome. 5 years ago Michael was twice Tom's age. How old is... (answered by stanbon)
Michael is 6 years older than Vanessa. Seven years ago, Michael was 3 times as old as... (answered by htmentor)
Michael is 8 years older than Emily. Four years ago, Michael was 3 times as old as Emily.
(answered by oscargut)
Cindy is 6 years older than Michael. Six years ago she was twice as old as he. How old is (answered by josgarithmetic,greenestamps)