Question

In a certain county, the number of charter schools is 4 less than twice the number of alternative schools. We know that there are 48 charter schools in the county. How many alternative schools are in the county?

Answer 1

let's write is as an equation:

x- charter schools
z- alternative schools

x=y*2-4

now, we know that there are 48 charter schools, x=48, so

48=y*2-4
48+4=y*2
52=y*2
52/2=y
26=y.

So there are 26 alternative schools.