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

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


k in (-oo:+oo)

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

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

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

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

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

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

8-5/2*k = 0

(8-5/2*k)/5 = 0

(8-5/2*k)/5 = 0 // * 5

8-5/2*k = 0

8-5/2*k = 0 // - 8

-5/2*k = -8 // : -5/2

k = -8/(-5/2)

k = 16/5

k = 16/5

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