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Simplifying 3x + -20 = x + 9 Reorder the terms: -20 + 3x = x + 9 Reorder the terms: -20 + 3x = 9 + x Solving -20 + 3x = 9 + 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. -20 + 3x + -1x = 9 + x + -1x Combine like terms: 3x + -1x = 2x -20 + 2x = 9 + x + -1x Combine like terms: x + -1x = 0 -20 + 2x = 9 + 0 -20 + 2x = 9 Add '20' to each side of the equation. -20 + 20 + 2x = 9 + 20 Combine like terms: -20 + 20 = 0 0 + 2x = 9 + 20 2x = 9 + 20 Combine like terms: 9 + 20 = 29 2x = 29 Divide each side by '2'. x = 14.5 Simplifying x = 14.5
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