7(-2n+9)=-21

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Solution for 7(-2n+9)=-21 equation: 


n in (-oo:+oo)

7*(9-2*n) = -21 // + 21

7*(9-2*n)+21 = 0

7*(9-2*n)+21 = 0

84-14*n = 0

84-14*n = 0

84-14*n = 0 // - 84

-14*n = -84 // : -14

n = -84/(-14)

n = 6

n = 6

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