7(-7m-1)=-399

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Solution for 7(-7m-1)=-399 equation: 


m in (-oo:+oo)

7*(-7*m-1) = -399 // + 399

7*(-7*m-1)+399 = 0

7*(-7*m-1)+399 = 0

392-49*m = 0

392-49*m = 0

392-49*m = 0 // - 392

-49*m = -392 // : -49

m = -392/(-49)

m = 8

m = 8

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