a/a-21=-40/a-29

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Solution for a/a-21=-40/a-29 equation: 


D( a )

a = 0

a = 0

a = 0

a in (-oo:0) U (0:+oo)

a/a-21 = -40/a-29 // + -40/a-29

a/a-(-40/a)-21+29 = 0

40*a^-1+a/a-21+29 = 0

40*a^-1 = -9 // : 40

a^-1 = -9/40

-1 < 0

1/(a^1) = -9/40 // * a^1

1 = -9/40*a^1 // : -9/40

-40/9 = a^1

a = -40/9

a = -40/9

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