Problem:

The ratio of men to women on a bus is 5/7. Two women and one man board the bus and the ratio is then 7/10. How many men and women were on the bus before the other three passengers boarded?

Problem:

The ratio of men to women on a bus is 5/7. Two women and one man board the bus and the ratio is then 7/10. How many men and women were on the bus before the other three passengers boarded?

I have not done much with ratios so I am having trouble figuring out an equation to figure this out. Any help would be appreciated. Thank you ^_^