4b+7=-21

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Solution for 4b+7=-21 equation: 


b in (-oo:+oo)

4*b+7 = -21 // + 21

4*b+7+21 = 0

4*b+28 = 0 // - 28

4*b = -28 // : 4

b = -28/4

b = -7

b = -7

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