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Simplifying -3x + 20 = -2x + 21 Reorder the terms: 20 + -3x = -2x + 21 Reorder the terms: 20 + -3x = 21 + -2x Solving 20 + -3x = 21 + -2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2x' to each side of the equation. 20 + -3x + 2x = 21 + -2x + 2x Combine like terms: -3x + 2x = -1x 20 + -1x = 21 + -2x + 2x Combine like terms: -2x + 2x = 0 20 + -1x = 21 + 0 20 + -1x = 21 Add '-20' to each side of the equation. 20 + -20 + -1x = 21 + -20 Combine like terms: 20 + -20 = 0 0 + -1x = 21 + -20 -1x = 21 + -20 Combine like terms: 21 + -20 = 1 -1x = 1 Divide each side by '-1'. x = -1 Simplifying x = -1
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