N/15=21/45

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Solution for N/15=21/45 equation: 


N in (-oo:+oo)

N/15 = 21/45 // - 21/45

N/15-(21/45) = 0

N/15-7/15 = 0

1/15*N-7/15 = 0 // + 7/15

1/15*N = 7/15 // : 1/15

N = 7/15/1/15

N = 7

N = 7

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