3x^2+3y^2-21=0

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Solution for 3x^2+3y^2-21=0 equation:


Simplifying
3x2 + 3y2 + -21 = 0

Reorder the terms:
-21 + 3x2 + 3y2 = 0

Solving
-21 + 3x2 + 3y2 = 0

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + 3x2 + 21 + 3y2 = 0 + 21

Reorder the terms:
-21 + 21 + 3x2 + 3y2 = 0 + 21

Combine like terms: -21 + 21 = 0
0 + 3x2 + 3y2 = 0 + 21
3x2 + 3y2 = 0 + 21

Combine like terms: 0 + 21 = 21
3x2 + 3y2 = 21

Add '-3y2' to each side of the equation.
3x2 + 3y2 + -3y2 = 21 + -3y2

Combine like terms: 3y2 + -3y2 = 0
3x2 + 0 = 21 + -3y2
3x2 = 21 + -3y2

Divide each side by '3'.
x2 = 7 + -1y2

Simplifying
x2 = 7 + -1y2

Reorder the terms:
-7 + x2 + y2 = 7 + -1y2 + -7 + y2

Reorder the terms:
-7 + x2 + y2 = 7 + -7 + -1y2 + y2

Combine like terms: 7 + -7 = 0
-7 + x2 + y2 = 0 + -1y2 + y2
-7 + x2 + y2 = -1y2 + y2

Combine like terms: -1y2 + y2 = 0
-7 + x2 + y2 = 0

The solution to this equation could not be determined.

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