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Simplifying
6 + x2 = 84
Solving
6 + x2 = 84
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-6' to each side of the equation.
6 + -6 + x2 = 84 + -6
Combine like terms: 6 + -6 = 0
0 + x2 = 84 + -6
x2 = 84 + -6
Combine like terms: 84 + -6 = 78
x2 = 78
Simplifying
x2 = 78
Take the square root of each side:
x = {-8.831760866, 8.831760866}
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