3+7b+5b=123 - solution

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Solution for 3+7b+5b=123 equation:

b in (-oo:+oo)

7*b+5*b+3 = 123 // - 123

7*b+5*b-123+3 = 0

12*b-120 = 0 // + 120

12*b = 120 // : 12

b = 120/12

b = 10

b = 10

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