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Simplifying 1.3 + -2.1a(-4.2) = 3.36 Reorder the terms for easier multiplication: 1.3 + -2.1 * -4.2a = 3.36 Multiply -2.1 * -4.2 1.3 + 8.82a = 3.36 Solving 1.3 + 8.82a = 3.36 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1.3' to each side of the equation. 1.3 + -1.3 + 8.82a = 3.36 + -1.3 Combine like terms: 1.3 + -1.3 = 0.0 0.0 + 8.82a = 3.36 + -1.3 8.82a = 3.36 + -1.3 Combine like terms: 3.36 + -1.3 = 2.06 8.82a = 2.06 Divide each side by '8.82'. a = 0.2335600907 Simplifying a = 0.2335600907
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