3n+9=-4n+65

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Solution for 3n+9=-4n+65 equation: 


n in (-oo:+oo)

3*n+9 = 65-4*n // - 65-4*n

3*n-(-4*n)-65+9 = 0

3*n+4*n-65+9 = 0

7*n-56 = 0 // + 56

7*n = 56 // : 7

n = 56/7

n = 8

n = 8

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