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Simplifying
3x2 = 420
Solving
3x2 = 420
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Divide each side by '3'.
x2 = 140
Simplifying
x2 = 140
Take the square root of each side:
x = {-11.832159566, 11.832159566}
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