3x^2+x^2=225

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Solution for 3x^2+x^2=225 equation: 


Simplifying
3x2 + x2 = 225

Combine like terms: 3x2 + x2 = 4x2
4x2 = 225

Solving
4x2 = 225

Solving for variable 'x'.

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

Divide each side by '4'.
x2 = 56.25

Simplifying
x2 = 56.25

Take the square root of each side:
x = {-7.5, 7.5}

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