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Simplifying 2x + -21 + -9x = 1 Reorder the terms: -21 + 2x + -9x = 1 Combine like terms: 2x + -9x = -7x -21 + -7x = 1 Solving -21 + -7x = 1 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 + -7x = 1 + 21 Combine like terms: -21 + 21 = 0 0 + -7x = 1 + 21 -7x = 1 + 21 Combine like terms: 1 + 21 = 22 -7x = 22 Divide each side by '-7'. x = -3.142857143 Simplifying x = -3.142857143
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