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Simplifying 3x + 8 = 8x + -21 Reorder the terms: 8 + 3x = 8x + -21 Reorder the terms: 8 + 3x = -21 + 8x Solving 8 + 3x = -21 + 8x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8x' to each side of the equation. 8 + 3x + -8x = -21 + 8x + -8x Combine like terms: 3x + -8x = -5x 8 + -5x = -21 + 8x + -8x Combine like terms: 8x + -8x = 0 8 + -5x = -21 + 0 8 + -5x = -21 Add '-8' to each side of the equation. 8 + -8 + -5x = -21 + -8 Combine like terms: 8 + -8 = 0 0 + -5x = -21 + -8 -5x = -21 + -8 Combine like terms: -21 + -8 = -29 -5x = -29 Divide each side by '-5'. x = 5.8 Simplifying x = 5.8
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