x^2+3x^2=90

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Solution for x^2+3x^2=90 equation: 


Simplifying
x2 + 3x2 = 90

Combine like terms: x2 + 3x2 = 4x2
4x2 = 90

Solving
4x2 = 90

Solving for variable 'x'.

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

Divide each side by '4'.
x2 = 22.5

Simplifying
x2 = 22.5

Take the square root of each side:
x = {-4.74341649, 4.74341649}

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