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Simplifying 0.4x + 6.5 = 3.9 Reorder the terms: 6.5 + 0.4x = 3.9 Solving 6.5 + 0.4x = 3.9 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6.5' to each side of the equation. 6.5 + -6.5 + 0.4x = 3.9 + -6.5 Combine like terms: 6.5 + -6.5 = 0.0 0.0 + 0.4x = 3.9 + -6.5 0.4x = 3.9 + -6.5 Combine like terms: 3.9 + -6.5 = -2.6 0.4x = -2.6 Divide each side by '0.4'. x = -6.5 Simplifying x = -6.5
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