21=-3/8x

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Solution for 21=-3/8x equation: 


x in (-oo:+oo)

21 = (-3/8)*x // - (-3/8)*x

21-((-3/8)*x) = 0

(3/8)*x+21 = 0

3/8*x+21 = 0 // - 21

3/8*x = -21 // : 3/8

x = -21/3/8

x = -56

x = -56

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