n/13=21/3

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Solution for n/13=21/3 equation: 


n in (-oo:+oo)

n/13 = 21/3 // - 21/3

n/13-(21/3) = 0

n/13-7 = 0

1/13*n-7 = 0 // + 7

1/13*n = 7 // : 1/13

n = 7/1/13

n = 91

n = 91

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