SOLUTION: When 18 boys joined a group of y students, the ratio of boys to girls to girls in the group became 4:5. Write an algebraic expression for the number of girls in terms of y?

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: When 18 boys joined a group of y students, the ratio of boys to girls to girls in the group became 4:5. Write an algebraic expression for the number of girls in terms of y?      Log On


   

Question 1170040: When 18 boys joined a group of y students, the ratio of boys to girls to girls in the group became 4:5. Write an algebraic expression for the number of girls in terms of y?
Found 2 solutions by ikleyn, josgarithmetic:
Answer by ikleyn(52787) About Me  (Show Source):
You can put this solution on YOUR website!
.

Unclear.


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Notice that @josgarithmetic in his post solves DIFFERENT problem from that written in your post.

I am absolutely not sure that it is what you want.


I really do not know what you want - it is UNCLEAR from your post.


And I think that in this situation, the correct (the right) formulation should go from the visitor

- - - not from the tutor.



Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
18 boys is joined by a group of x girls and y boys.

Ratio BOYS to GIRLS became 4%2F5.

%28y%2B18%29%2Fx=4%2F5----------solve this for x, the asked-for number of girls.