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Simplifying
20 = 2x2 + 2
Reorder the terms:
20 = 2 + 2x2
Solving
20 = 2 + 2x2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-2x2' to each side of the equation.
20 + -2x2 = 2 + 2x2 + -2x2
Combine like terms: 2x2 + -2x2 = 0
20 + -2x2 = 2 + 0
20 + -2x2 = 2
Add '-20' to each side of the equation.
20 + -20 + -2x2 = 2 + -20
Combine like terms: 20 + -20 = 0
0 + -2x2 = 2 + -20
-2x2 = 2 + -20
Combine like terms: 2 + -20 = -18
-2x2 = -18
Divide each side by '-2'.
x2 = 9
Simplifying
x2 = 9
Take the square root of each side:
x = {-3, 3}
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