n/5=21/15 - solution

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Solution for n/5=21/15 equation:

n in (-oo:+oo)

n/5 = 21/15 // - 21/15

n/5-(21/15) = 0

n/5-7/5 = 0

1/5*n-7/5 = 0 // + 7/5

1/5*n = 7/5 // : 1/5

n = 7/5/1/5

n = 7

n = 7

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