3/A=12/28

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Solution for 3/A=12/28 equation: 


D( A )

A = 0

A = 0

A = 0

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

3/A = 12/28 // - 12/28

3/A-(12/28) = 0

3/A-3/7 = 0

3*A^-1 = 3/7 // : 3

A^-1 = 1/7

-1 < 0

1/(A^1) = 1/7 // * A^1

1 = 1/7*A^1 // : 1/7

7 = A^1

A = 7

A = 7

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