15=-b/4+9 - solution

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Solution for 15=-b/4+9 equation:

b in (-oo:+oo)

15 = 9-b/4 // - 9-b/4

15-(-b/4)-9 = 0

(1/4)*b-9+15 = 0

1/4*b+6 = 0 // - 6

1/4*b = -6 // : 1/4

b = -6/1/4

b = -24

b = -24

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