21=-3/5w

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Solution for 21=-3/5w equation: 


w in (-oo:+oo)

21 = (-3/5)*w // - (-3/5)*w

21-((-3/5)*w) = 0

(3/5)*w+21 = 0

3/5*w+21 = 0 // - 21

3/5*w = -21 // : 3/5

w = -21/3/5

w = -35

w = -35

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