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Simplifying -21 + 2x = -2 + -5(-1 + -1x) -21 + 2x = -2 + (-1 * -5 + -1x * -5) -21 + 2x = -2 + (5 + 5x) Combine like terms: -2 + 5 = 3 -21 + 2x = 3 + 5x Solving -21 + 2x = 3 + 5x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5x' to each side of the equation. -21 + 2x + -5x = 3 + 5x + -5x Combine like terms: 2x + -5x = -3x -21 + -3x = 3 + 5x + -5x Combine like terms: 5x + -5x = 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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