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Simplifying (1.3 + -2.1a)(-4.2) = 3.34 Reorder the terms for easier multiplication: -4.2(1.3 + -2.1a) = 3.34 (1.3 * -4.2 + -2.1a * -4.2) = 3.34 (-5.46 + 8.82a) = 3.34 Solving -5.46 + 8.82a = 3.34 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '5.46' to each side of the equation. -5.46 + 5.46 + 8.82a = 3.34 + 5.46 Combine like terms: -5.46 + 5.46 = 0.00 0.00 + 8.82a = 3.34 + 5.46 8.82a = 3.34 + 5.46 Combine like terms: 3.34 + 5.46 = 8.8 8.82a = 8.8 Divide each side by '8.82'. a = 0.9977324263 Simplifying a = 0.9977324263
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