How do I solve this

Question

How do I solve this, “Students surveyed boys and girls separately to determine which sport was enjoyed the most. After completing the boy survey, it was determined that for every 3 boys who enjoyed soccer, 5 boys enjoyed basketball. The girl survey had a ratio of number of girls who enjoyed soccer to the number of girls who enjoyed basketball of 7:1. If the same number of boys and girls were surveyed, and 90 boys enjoy soccer, how many girls enjoy each sport?

Answer 1

3/ 5 = 90/x

 

x = 150 boys who enjoyed basketball

 

But, I don't think you can figure out the girls...the 7/1 ratio could mean anything:  could be 210/30, or, could be 105/15, or could be 21/3.

 

If you assume equal numbers of boys and girls, then there are 240 girls, so, it's 210/30  210 like soccer and 30 like basketball.