X^2+y^2-8x+4y-4=0

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Solution for X^2+y^2-8x+4y-4=0 equation: 


Simplifying
X2 + y2 + -8x + 4y + -4 = 0

Reorder the terms:
-4 + X2 + -8x + 4y + y2 = 0

Solving
-4 + X2 + -8x + 4y + y2 = 0

Solving for variable 'X'.

Move all terms containing X to the left, all other terms to the right.

Add '4' to each side of the equation.
-4 + X2 + -8x + 4y + 4 + y2 = 0 + 4

Reorder the terms:
-4 + 4 + X2 + -8x + 4y + y2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + X2 + -8x + 4y + y2 = 0 + 4
X2 + -8x + 4y + y2 = 0 + 4

Combine like terms: 0 + 4 = 4
X2 + -8x + 4y + y2 = 4

Add '8x' to each side of the equation.
X2 + -8x + 4y + 8x + y2 = 4 + 8x

Reorder the terms:
X2 + -8x + 8x + 4y + y2 = 4 + 8x

Combine like terms: -8x + 8x = 0
X2 + 0 + 4y + y2 = 4 + 8x
X2 + 4y + y2 = 4 + 8x

Add '-4y' to each side of the equation.
X2 + 4y + -4y + y2 = 4 + 8x + -4y

Combine like terms: 4y + -4y = 0
X2 + 0 + y2 = 4 + 8x + -4y
X2 + y2 = 4 + 8x + -4y

Add '-1y2' to each side of the equation.
X2 + y2 + -1y2 = 4 + 8x + -4y + -1y2

Combine like terms: y2 + -1y2 = 0
X2 + 0 = 4 + 8x + -4y + -1y2
X2 = 4 + 8x + -4y + -1y2

Simplifying
X2 = 4 + 8x + -4y + -1y2

Reorder the terms:
-4 + X2 + -8x + 4y + y2 = 4 + 8x + -4y + -1y2 + -4 + -8x + 4y + y2

Reorder the terms:
-4 + X2 + -8x + 4y + y2 = 4 + -4 + 8x + -8x + -4y + 4y + -1y2 + y2

Combine like terms: 4 + -4 = 0
-4 + X2 + -8x + 4y + y2 = 0 + 8x + -8x + -4y + 4y + -1y2 + y2
-4 + X2 + -8x + 4y + y2 = 8x + -8x + -4y + 4y + -1y2 + y2

Combine like terms: 8x + -8x = 0
-4 + X2 + -8x + 4y + y2 = 0 + -4y + 4y + -1y2 + y2
-4 + X2 + -8x + 4y + y2 = -4y + 4y + -1y2 + y2

Combine like terms: -4y + 4y = 0
-4 + X2 + -8x + 4y + y2 = 0 + -1y2 + y2
-4 + X2 + -8x + 4y + y2 = -1y2 + y2

Combine like terms: -1y2 + y2 = 0
-4 + X2 + -8x + 4y + y2 = 0

The solution to this equation could not be determined.

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