Question

help?
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?
52
22
36
26

i tried 48 + 48 = 94 then going to 94 - 4 to get 90 but that's not an answer...???

Answer 1

let's define our variables

let a = number of alternative schools
let c = number of charter schools

with me so far?

Answer 2

yes i am

Answer 3

ok, it says that

""number of charter schools is 4 less than twice the number of alternative schools."

so c = 2a - 4, with me so far?

Answer 4

yep. thats what ive already done though.

Answer 5

ok, it also says that the number of charter schools is 48

so we have:

c = 2a - 4

48 = 2a - 4

do you know how to solve for a now?

Answer 6

uh- sorry you lost me, 2a would be 2*48 right? and that makes 94? but then take away 4 to get 90?
but there is not an option for that

Answer 7

noope, not quite

Answer 8

we don't know what a is yet, that's what we want to find

Answer 9

our equation is

48 = 2a - 4

start by adding 4 to each side.

Answer 10

ooohh
okay
so adding five
52=2a-8?

Answer 11

nope, not quite.

Answer 12

2a-4+4 = ?

Answer 13

4+4= 8
2a-8?

Answer 14

nope

-4+4 = ?

Answer 15

ooooh crud -4 sorry
so 0
(im sorry im not the smartest ;-;)

Answer 16

don't apologize, you're doing fine :)

so 2a-4+4 = 2a

now we have

2a = 52

divide both sides by 2 to find a

Answer 17

26?

Answer 18

good! that's our answer ~

Answer 19

oh that makes a lot more sense then what i was doing thank you so much