2/5=4/5x

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Solution for 2/5=4/5x equation: 


x in (-oo:+oo)

2/5 = (4/5)*x // - (4/5)*x

2/5-((4/5)*x) = 0

(-4/5)*x+2/5 = 0

2/5-4/5*x = 0 // - 2/5

-4/5*x = -2/5 // : -4/5

x = -2/5/(-4/5)

x = 1/2

x = 1/2

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