1/2*4-k=2/5

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Solution for 1/2*4-k=2/5 equation: 


k in (-oo:+oo)

4*(1/2)-k = 2/5 // - 2/5

4*(1/2)-k-(2/5) = 0

4*(1/2)-k-2/5 = 0

8/5-k = 0 // - 8/5

-k = -8/5 // * -1

k = 8/5

k = 8/5

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