n-2n/5=12

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Solution for n-2n/5=12 equation: 


n in (-oo:+oo)

n-((2*n)/5) = 12 // - 12

n-((2*n)/5)-12 = 0

n+(-2/5)*n-12 = 0

3/5*n-12 = 0 // + 12

3/5*n = 12 // : 3/5

n = 12/3/5

n = 20

n = 20

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