4=-8/9*-4+b - solution

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Solution for 4=-8/9*-4+b equation:

b in (-oo:+oo)

4 = b-4*(-8/9) // - b-4*(-8/9)

4-b-(-4*(-8/9)) = 0

4-b-32/9 = 0

4/9-b = 0 // - 4/9

-b = -4/9 // * -1

b = 4/9

b = 4/9

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