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Simplifying -9x + -21 = 13 + 2x Reorder the terms: -21 + -9x = 13 + 2x Solving -21 + -9x = 13 + 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. -21 + -9x + -2x = 13 + 2x + -2x Combine like terms: -9x + -2x = -11x -21 + -11x = 13 + 2x + -2x Combine like terms: 2x + -2x = 0 -21 + -11x = 13 + 0 -21 + -11x = 13 Add '21' to each side of the equation. -21 + 21 + -11x = 13 + 21 Combine like terms: -21 + 21 = 0 0 + -11x = 13 + 21 -11x = 13 + 21 Combine like terms: 13 + 21 = 34 -11x = 34 Divide each side by '-11'. x = -3.090909091 Simplifying x = -3.090909091
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