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Simplifying 2x + -11x + -21 = 0 Reorder the terms: -21 + 2x + -11x = 0 Combine like terms: 2x + -11x = -9x -21 + -9x = 0 Solving -21 + -9x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 21 + -9x = 0 + 21 Combine like terms: -21 + 21 = 0 0 + -9x = 0 + 21 -9x = 0 + 21 Combine like terms: 0 + 21 = 21 -9x = 21 Divide each side by '-9'. x = -2.333333333 Simplifying x = -2.333333333
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