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Simplifying
98x2 = 40
Solving
98x2 = 40
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Divide each side by '98'.
x2 = 0.4081632653
Simplifying
x2 = 0.4081632653
Take the square root of each side:
x = {-0.638876565, 0.638876565}
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