40=2/5x

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Solution for 40=2/5x equation: 


x in (-oo:+oo)

40 = (2/5)*x // - (2/5)*x

40-((2/5)*x) = 0

(-2/5)*x+40 = 0

40-2/5*x = 0 // - 40

-2/5*x = -40 // : -2/5

x = -40/(-2/5)

x = 100

x = 100

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