42=7b+2b-3

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Solution for 42=7b+2b-3 equation: 


b in (-oo:+oo)

42 = 7*b+2*b-3 // - 7*b+2*b-3

3-(7*b)-(2*b)+42 = 0

3-7*b-2*b+42 = 0

45-9*b = 0 // - 45

-9*b = -45 // : -9

b = -45/(-9)

b = 5

b = 5

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