4n+9=5n+12

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Solution for 4n+9=5n+12 equation: 


n in (-oo:+oo)

4*n+9 = 5*n+12 // - 5*n+12

4*n-(5*n)-12+9 = 0

4*n-5*n-12+9 = 0

-n-3 = 0 // + 3

-n = 3 // * -1

n = -3

n = -3

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