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Simplifying 2x + -3 = -21 + -1x Reorder the terms: -3 + 2x = -21 + -1x Solving -3 + 2x = -21 + -1x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add 'x' to each side of the equation. -3 + 2x + x = -21 + -1x + x Combine like terms: 2x + x = 3x -3 + 3x = -21 + -1x + x Combine like terms: -1x + x = 0 -3 + 3x = -21 + 0 -3 + 3x = -21 Add '3' to each side of the equation. -3 + 3 + 3x = -21 + 3 Combine like terms: -3 + 3 = 0 0 + 3x = -21 + 3 3x = -21 + 3 Combine like terms: -21 + 3 = -18 3x = -18 Divide each side by '3'. x = -6 Simplifying x = -6
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