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Simplifying
20x2 = 90
Solving
20x2 = 90
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Divide each side by '20'.
x2 = 4.5
Simplifying
x2 = 4.5
Take the square root of each side:
x = {-2.121320344, 2.121320344}
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