4/(3k+5)-7/(k+4)

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Solution for 4/(3k+5)-7/(k+4) equation: 


D( k )

k+4 = 0

3*k+5 = 0

k+4 = 0

k+4 = 0

k+4 = 0 // - 4

k = -4

3*k+5 = 0

3*k+5 = 0

3*k+5 = 0 // - 5

3*k = -5 // : 3

k = -5/3

k in (-oo:-4) U (-4:-5/3) U (-5/3:+oo)

4/(3*k+5)-(7/(k+4)) = 0

4/(3*k+5)-7*(k+4)^-1 = 0

4/(3*k+5)-7/(k+4) = 0

(4*(k+4))/((3*k+5)*(k+4))+(-7*(3*k+5))/((3*k+5)*(k+4)) = 0

4*(k+4)-7*(3*k+5) = 0

-17*k-19 = 0

(-17*k-19)/((3*k+5)*(k+4)) = 0

(-17*k-19)/((3*k+5)*(k+4)) = 0 // * (3*k+5)*(k+4)

-17*k-19 = 0

-17*k-19 = 0 // + 19

-17*k = 19 // : -17

k = 19/(-17)

k = -19/17

k = -19/17

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