3x^2-x^2=162

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Solution for 3x^2-x^2=162 equation: 


Simplifying
3x2 + -1x2 = 162

Combine like terms: 3x2 + -1x2 = 2x2
2x2 = 162

Solving
2x2 = 162

Solving for variable 'x'.

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

Divide each side by '2'.
x2 = 81

Simplifying
x2 = 81

Take the square root of each side:
x = {-9, 9}

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