9-5n+7n=27

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Solution for 9-5n+7n=27 equation: 


n in (-oo:+oo)

7*n-(5*n)+9 = 27 // - 27

7*n-(5*n)-27+9 = 0

7*n-5*n-27+9 = 0

2*n-18 = 0 // + 18

2*n = 18 // : 2

n = 18/2

n = 9

n = 9

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