1/2b+3/8b=21 - solution

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Solution for 1/2b+3/8b=21 equation:

b in (-oo:+oo)

(1/2)*b+(3/8)*b = 21 // - 21

(1/2)*b+(3/8)*b-21 = 0

7/8*b-21 = 0 // + 21

7/8*b = 21 // : 7/8

b = 21/7/8

b = 24

b = 24

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