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Simplifying 3.1a + -3.9 = 3.54 Reorder the terms: -3.9 + 3.1a = 3.54 Solving -3.9 + 3.1a = 3.54 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '3.9' to each side of the equation. -3.9 + 3.9 + 3.1a = 3.54 + 3.9 Combine like terms: -3.9 + 3.9 = 0.0 0.0 + 3.1a = 3.54 + 3.9 3.1a = 3.54 + 3.9 Combine like terms: 3.54 + 3.9 = 7.44 3.1a = 7.44 Divide each side by '3.1'. a = 2.4 Simplifying a = 2.4
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