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Simplifying -2x + -21 = x + 3 Reorder the terms: -21 + -2x = x + 3 Reorder the terms: -21 + -2x = 3 + x Solving -21 + -2x = 3 + 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. -21 + -2x + -1x = 3 + x + -1x Combine like terms: -2x + -1x = -3x -21 + -3x = 3 + x + -1x Combine like terms: x + -1x = 0 -21 + -3x = 3 + 0 -21 + -3x = 3 Add '21' to each side of the equation. -21 + 21 + -3x = 3 + 21 Combine like terms: -21 + 21 = 0 0 + -3x = 3 + 21 -3x = 3 + 21 Combine like terms: 3 + 21 = 24 -3x = 24 Divide each side by '-3'. x = -8 Simplifying x = -8
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