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Simplifying 28x + 21 = -42 + -1x Reorder the terms: 21 + 28x = -42 + -1x Solving 21 + 28x = -42 + -1x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add 'x' to each side of the equation. 21 + 28x + x = -42 + -1x + x Combine like terms: 28x + x = 29x 21 + 29x = -42 + -1x + x Combine like terms: -1x + x = 0 21 + 29x = -42 + 0 21 + 29x = -42 Add '-21' to each side of the equation. 21 + -21 + 29x = -42 + -21 Combine like terms: 21 + -21 = 0 0 + 29x = -42 + -21 29x = -42 + -21 Combine like terms: -42 + -21 = -63 29x = -63 Divide each side by '29'. x = -2.172413793 Simplifying x = -2.172413793
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