Out of 32 students in a class, 5 said they ride a bike to school. based on these results, how many of the 800 students in the school ride their bikes to school?

We can write a proportion for this question
5 out of 32 students and we have to find how many (x) out of 800
5/32 = x /800
cross multiply
5*800 = 32x
4000 = 32x
divide both sides by 32
125 = x

About 125 students of the 800 ride their bikes to school.

Hope this helps :)

Does the problem say y=x+4?

The answer would be (8+7z)/5