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Simplifying 3x + 84 = x Reorder the terms: 84 + 3x = x Solving 84 + 3x = x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1x' to each side of the equation. 84 + 3x + -1x = x + -1x Combine like terms: 3x + -1x = 2x 84 + 2x = x + -1x Combine like terms: x + -1x = 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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