7b-7+6b=123 - solution

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Solution for 7b-7+6b=123 equation:

b in (-oo:+oo)

7*b+6*b-7 = 123 // - 123

7*b+6*b-123-7 = 0

13*b-130 = 0 // + 130

13*b = 130 // : 13

b = 130/13

b = 10

b = 10

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