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Simplifying 2(x + -3) + -13 = x + -21 Reorder the terms: 2(-3 + x) + -13 = x + -21 (-3 * 2 + x * 2) + -13 = x + -21 (-6 + 2x) + -13 = x + -21 Reorder the terms: -6 + -13 + 2x = x + -21 Combine like terms: -6 + -13 = -19 -19 + 2x = x + -21 Reorder the terms: -19 + 2x = -21 + x Solving -19 + 2x = -21 + 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. -19 + 2x + -1x = -21 + x + -1x Combine like terms: 2x + -1x = 1x -19 + 1x = -21 + x + -1x Combine like terms: x + -1x = 0 -19 + 1x = -21 + 0 -19 + 1x = -21 Add '19' to each side of the equation. -19 + 19 + 1x = -21 + 19 Combine like terms: -19 + 19 = 0 0 + 1x = -21 + 19 1x = -21 + 19 Combine like terms: -21 + 19 = -2 1x = -2 Divide each side by '1'. x = -2 Simplifying x = -2
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