21=-3/4w

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Solution for 21=-3/4w equation: 


w in (-oo:+oo)

21 = (-3/4)*w // - (-3/4)*w

21-((-3/4)*w) = 0

(3/4)*w+21 = 0

3/4*w+21 = 0 // - 21

3/4*w = -21 // : 3/4

w = -21/3/4

w = -28

w = -28

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