6+n+4n=21 - solution

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Solution for 6+n+4n=21 equation:

n in (-oo:+oo)

n+4*n+6 = 21 // - 21

n+4*n-21+6 = 0

5*n-15 = 0 // + 15

5*n = 15 // : 5

n = 15/5

n = 3

n = 3

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