7(-1+1b)=-21

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Solution for 7(-1+1b)=-21 equation: 


b in (-oo:+oo)

7*(1*b-1) = -21 // + 21

7*(1*b-1)+21 = 0

7*(b-1)+21 = 0

7*(b-1)+21 = 0

7*b+14 = 0

7*b+14 = 0

7*b+14 = 0 // - 14

7*b = -14 // : 7

b = -14/7

b = -2

b = -2

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