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Simplifying 42 = -2x Solving 42 = -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. 42 + 2x = -2x + 2x Combine like terms: -2x + 2x = 0 42 + 2x = 0 Add '-42' to each side of the equation. 42 + -42 + 2x = 0 + -42 Combine like terms: 42 + -42 = 0 0 + 2x = 0 + -42 2x = 0 + -42 Combine like terms: 0 + -42 = -42 2x = -42 Divide each side by '2'. x = -21 Simplifying x = -21
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