college algebra

One positive number is one-fifth of another number. The difference between the two numbers is 200, find the numbers.

Im not sure how to approach this problem

x-1/5 = x+200 ?
I also keep wanting to divided 200/5 .. Please help Im all over the place not sure what to do

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  1. M-n=200
    M=n/5

    n/5-n=200
    -4/5n=200 notice it is negative, so this solution cannot be allowed, So we change the second equation to

    M/5=n
    Now
    M-M/5=200
    4/5 M=200
    M=250
    and n=50

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