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Simplifying 3.9 + -2x = -13.1 Solving 3.9 + -2x = -13.1 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.9' to each side of the equation. 3.9 + -3.9 + -2x = -13.1 + -3.9 Combine like terms: 3.9 + -3.9 = 0.0 0.0 + -2x = -13.1 + -3.9 -2x = -13.1 + -3.9 Combine like terms: -13.1 + -3.9 = -17 -2x = -17 Divide each side by '-2'. x = 8.5 Simplifying x = 8.5
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