x^2+2x^2=20

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Solution for x^2+2x^2=20 equation: 


Simplifying
x2 + 2x2 = 20

Combine like terms: x2 + 2x2 = 3x2
3x2 = 20

Solving
3x2 = 20

Solving for variable 'x'.

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

Divide each side by '3'.
x2 = 6.666666667

Simplifying
x2 = 6.666666667

Take the square root of each side:
x = {-2.581988898, 2.581988898}

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