9+7n=-4n+20

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Solution for 9+7n=-4n+20 equation: 


n in (-oo:+oo)

7*n+9 = 20-4*n // - 20-4*n

7*n-(-4*n)-20+9 = 0

7*n+4*n-20+9 = 0

11*n-11 = 0 // + 11

11*n = 11 // : 11

n = 11/11

n = 1

n = 1

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