Asked by Pearl
Christian is 3 times as old as Marie. Marie is 12 years younger than Christian. How old is Christian?
Answers
Answered by
PsyDAG
See second post.
Answered by
Pearl
Thank you! Appreciate your help. I needed something that is easy to understand and explain to a 5th grader.
Answered by
unowen
Let c be Christian, and m be Marie. Then:
c=3m and
m=c-12
So:
3(c-12)=c
3c-36=c
2c=36
c=18
☺☺☺☺
c=3m and
m=c-12
So:
3(c-12)=c
3c-36=c
2c=36
c=18
☺☺☺☺
Answered by
Joe
Makes no sense. Where did 2c=36 come from?
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