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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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