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15 July, 16:22

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

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  1. 15 July, 19:14
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    1. Let's call the number of carter school: "x" and "y" the number of alternative school. Then, you have that:

    - T he number of charter schools is 4 less than twice the number of alternative schools.

    - T here are 48 charter schools in the country.

    2. So, you have:

    x=2y-4 (i)

    x=48 (ii)

    3. Then, when you substitute x=48 into the equation (i), you obtain:

    x=2y-4

    48=2y-4

    4. Now, you must clear "y, as below:

    48+4=2y

    2y=52

    y=52/2

    y=26

    How many alternative schools are in the county?

    The answer is: There are 26 alternative schools.
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