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Simplifying 21x + 40 + 21 = 0 Reorder the terms: 40 + 21 + 21x = 0 Combine like terms: 40 + 21 = 61 61 + 21x = 0 Solving 61 + 21x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-61' to each side of the equation. 61 + -61 + 21x = 0 + -61 Combine like terms: 61 + -61 = 0 0 + 21x = 0 + -61 21x = 0 + -61 Combine like terms: 0 + -61 = -61 21x = -61 Divide each side by '21'. x = -2.904761905 Simplifying x = -2.904761905
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