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Simplifying
(-42x)(2x) = 0
Remove parenthesis around (-42x)
-42x(2x) = 0
Remove parenthesis around (2x)
-42x * 2x = 0
Reorder the terms for easier multiplication:
-42 * 2x * x = 0
Multiply -42 * 2
-84x * x = 0
Multiply x * x
-84x2 = 0
Solving
-84x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Divide each side by '-84'.
x2 = 0
Simplifying
x2 = 0
Take the square root of each side:
x = {0}
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