-4/a=1

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Solution for -4/a=1 equation: 


D( a )

a = 0

a = 0

a = 0

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

-4/a = 1 // - 1

-4/a-1 = 0

-4*a^-1 = 1 // : -4

a^-1 = -1/4

-1 < 0

1/(a^1) = -1/4 // * a^1

1 = -1/4*a^1 // : -1/4

-4 = a^1

a = -4

a = -4

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