69-3x^2=42

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Solution for 69-3x^2=42 equation: 


Simplifying
69 + -3x2 = 42

Solving
69 + -3x2 = 42

Solving for variable 'x'.

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

Add '-69' to each side of the equation.
69 + -69 + -3x2 = 42 + -69

Combine like terms: 69 + -69 = 0
0 + -3x2 = 42 + -69
-3x2 = 42 + -69

Combine like terms: 42 + -69 = -27
-3x2 = -27

Divide each side by '-3'.
x2 = 9

Simplifying
x2 = 9

Take the square root of each side:
x = {-3, 3}

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