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Simplifying -2x + 21 = 30 + -3x Reorder the terms: 21 + -2x = 30 + -3x Solving 21 + -2x = 30 + -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. 21 + -2x + 3x = 30 + -3x + 3x Combine like terms: -2x + 3x = 1x 21 + 1x = 30 + -3x + 3x Combine like terms: -3x + 3x = 0 21 + 1x = 30 + 0 21 + 1x = 30 Add '-21' to each side of the equation. 21 + -21 + 1x = 30 + -21 Combine like terms: 21 + -21 = 0 0 + 1x = 30 + -21 1x = 30 + -21 Combine like terms: 30 + -21 = 9 1x = 9 Divide each side by '1'. x = 9 Simplifying x = 9
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