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Simplifying 3x + 8(2 + -1x) = 20 3x + (2 * 8 + -1x * 8) = 20 3x + (16 + -8x) = 20 Reorder the terms: 16 + 3x + -8x = 20 Combine like terms: 3x + -8x = -5x 16 + -5x = 20 Solving 16 + -5x = 20 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-16' to each side of the equation. 16 + -16 + -5x = 20 + -16 Combine like terms: 16 + -16 = 0 0 + -5x = 20 + -16 -5x = 20 + -16 Combine like terms: 20 + -16 = 4 -5x = 4 Divide each side by '-5'. x = -0.8 Simplifying x = -0.8
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