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Simplifying 21x + 42 = -578 Reorder the terms: 42 + 21x = -578 Solving 42 + 21x = -578 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-42' to each side of the equation. 42 + -42 + 21x = -578 + -42 Combine like terms: 42 + -42 = 0 0 + 21x = -578 + -42 21x = -578 + -42 Combine like terms: -578 + -42 = -620 21x = -620 Divide each side by '21'. x = -29.52380952 Simplifying x = -29.52380952
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