-42=-7b-5b+6

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Solution for -42=-7b-5b+6 equation: 


b in (-oo:+oo)

-42 = 6-7*b-(5*b) // - 6-7*b-(5*b)

5*b-(-7*b)-42-6 = 0

7*b+5*b-42-6 = 0

12*b-48 = 0 // + 48

12*b = 48 // : 12

b = 48/12

b = 4

b = 4

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