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Simplifying 7.5a + -3.9 = 27.60 Reorder the terms: -3.9 + 7.5a = 27.60 Solving -3.9 + 7.5a = 27.60 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 + 7.5a = 27.60 + 3.9 Combine like terms: -3.9 + 3.9 = 0.0 0.0 + 7.5a = 27.60 + 3.9 7.5a = 27.60 + 3.9 Combine like terms: 27.60 + 3.9 = 31.5 7.5a = 31.5 Divide each side by '7.5'. a = 4.2 Simplifying a = 4.2
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