b/9-7=-1 - solution

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Solution for b/9-7=-1 equation:

b in (-oo:+oo)

b/9-7 = -1 // + 1

b/9-7+1 = 0

1/9*b-6 = 0 // + 6

1/9*b = 6 // : 1/9

b = 6/1/9

b = 54

b = 54

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