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Simplifying -4.3x + 4.5(1 + -3.1x) = 68.5 -4.3x + (1 * 4.5 + -3.1x * 4.5) = 68.5 -4.3x + (4.5 + -13.95x) = 68.5 Reorder the terms: 4.5 + -4.3x + -13.95x = 68.5 Combine like terms: -4.3x + -13.95x = -18.25x 4.5 + -18.25x = 68.5 Solving 4.5 + -18.25x = 68.5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + -18.25x = 68.5 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + -18.25x = 68.5 + -4.5 -18.25x = 68.5 + -4.5 Combine like terms: 68.5 + -4.5 = 64 -18.25x = 64 Divide each side by '-18.25'. x = -3.506849315 Simplifying x = -3.506849315
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