21=3/5x

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Solution for 21=3/5x equation: 


x in (-oo:+oo)

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

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

(-3/5)*x+21 = 0

21-3/5*x = 0 // - 21

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

x = -21/(-3/5)

x = 35

x = 35

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