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Simplifying
18x2 + 9 = 18
Reorder the terms:
9 + 18x2 = 18
Solving
9 + 18x2 = 18
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-9' to each side of the equation.
9 + -9 + 18x2 = 18 + -9
Combine like terms: 9 + -9 = 0
0 + 18x2 = 18 + -9
18x2 = 18 + -9
Combine like terms: 18 + -9 = 9
18x2 = 9
Divide each side by '18'.
x2 = 0.5
Simplifying
x2 = 0.5
Take the square root of each side:
x = {-0.707106781, 0.707106781}
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