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Simplifying
0.66x2 + -4 = 12
Reorder the terms:
-4 + 0.66x2 = 12
Solving
-4 + 0.66x2 = 12
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '4' to each side of the equation.
-4 + 4 + 0.66x2 = 12 + 4
Combine like terms: -4 + 4 = 0
0 + 0.66x2 = 12 + 4
0.66x2 = 12 + 4
Combine like terms: 12 + 4 = 16
0.66x2 = 16
Divide each side by '0.66'.
x2 = 24.24242424
Simplifying
x2 = 24.24242424
Take the square root of each side:
x = {-4.923659639, 4.923659639}
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