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Simplifying 84x + 105(3x) = 0 Remove parenthesis around (3x) 84x + 105 * 3x = 0 Multiply 105 * 3 84x + 315x = 0 Combine like terms: 84x + 315x = 399x 399x = 0 Solving 399x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Divide each side by '399'. x = 0 Simplifying x = 0
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