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Simplifying 2x + -28 = x + 21 Reorder the terms: -28 + 2x = x + 21 Reorder the terms: -28 + 2x = 21 + x Solving -28 + 2x = 21 + 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. -28 + 2x + -1x = 21 + x + -1x Combine like terms: 2x + -1x = 1x -28 + 1x = 21 + x + -1x Combine like terms: x + -1x = 0 -28 + 1x = 21 + 0 -28 + 1x = 21 Add '28' to each side of the equation. -28 + 28 + 1x = 21 + 28 Combine like terms: -28 + 28 = 0 0 + 1x = 21 + 28 1x = 21 + 28 Combine like terms: 21 + 28 = 49 1x = 49 Divide each side by '1'. x = 49 Simplifying x = 49
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