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Simplifying
20x2 = 70
Solving
20x2 = 70
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Divide each side by '20'.
x2 = 3.5
Simplifying
x2 = 3.5
Take the square root of each side:
x = {-1.870828693, 1.870828693}
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