4b-9=39

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Solution for 4b-9=39 equation: 


b in (-oo:+oo)

4*b-9 = 39 // - 39

4*b-39-9 = 0

4*b-48 = 0 // + 48

4*b = 48 // : 4

b = 48/4

b = 12

b = 12

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