3(n/4)=21

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Solution for 3(n/4)=21 equation: 


n in (-oo:+oo)

3*(n/4) = 21 // - 21

3*(n/4)-21 = 0

3/4*n-21 = 0 // + 21

3/4*n = 21 // : 3/4

n = 21/3/4

n = 28

n = 28

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