7-4b=-9

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Solution for 7-4b=-9 equation: 


b in (-oo:+oo)

7-(4*b) = -9 // + 9

7-(4*b)+9 = 0

7-4*b+9 = 0

16-4*b = 0 // - 16

-4*b = -16 // : -4

b = -16/(-4)

b = 4

b = 4

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