7/1=n/3 - solution

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Solution for 7/1=n/3 equation:

n in (-oo:+oo)

7/1 = n/3 // - n/3

7/1-(n/3) = 0

7-(n/3) = 0

7-1/3*n = 0 // - 7

-1/3*n = -7 // : -1/3

n = -7/(-1/3)

n = 21

n = 21

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