3x^2-7=18

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Solution for 3x^2-7=18 equation: 


Simplifying
3x2 + -7 = 18

Reorder the terms:
-7 + 3x2 = 18

Solving
-7 + 3x2 = 18

Solving for variable 'x'.

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

Add '7' to each side of the equation.
-7 + 7 + 3x2 = 18 + 7

Combine like terms: -7 + 7 = 0
0 + 3x2 = 18 + 7
3x2 = 18 + 7

Combine like terms: 18 + 7 = 25
3x2 = 25

Divide each side by '3'.
x2 = 8.333333333

Simplifying
x2 = 8.333333333

Take the square root of each side:
x = {-2.886751346, 2.886751346}

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