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Simplifying x + -84 = 3x Reorder the terms: -84 + x = 3x Solving -84 + x = 3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3x' to each side of the equation. -84 + x + -3x = 3x + -3x Combine like terms: x + -3x = -2x -84 + -2x = 3x + -3x Combine like terms: 3x + -3x = 0 -84 + -2x = 0 Add '84' to each side of the equation. -84 + 84 + -2x = 0 + 84 Combine like terms: -84 + 84 = 0 0 + -2x = 0 + 84 -2x = 0 + 84 Combine like terms: 0 + 84 = 84 -2x = 84 Divide each side by '-2'. x = -42 Simplifying x = -42
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