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

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


D( k )

-k-4 = 0

-k-4 = 0

-k-4 = 0

-k-4 = 0 // + 4

-k = 4 // * -1

k = -4

k in (-oo:-4) U (-4:+oo)

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

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

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

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

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

-k-1 = 0

(-k-1)/(-k-4) = 0

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

-k-1 = 0

-k-1 = 0 // + 1

-k = 1 // * -1

k = -1

k = -1

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