7(4+2b)=84

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Solution for 7(4+2b)=84 equation: 


b in (-oo:+oo)

7*(2*b+4) = 84 // - 84

7*(2*b+4)-84 = 0

7*(2*b+4)-84 = 0

14*b-56 = 0

14*b-56 = 0

14*b-56 = 0 // + 56

14*b = 56 // : 14

b = 56/14

b = 4

b = 4

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