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Simplifying (7 + a) * 4 = 0 Reorder the terms for easier multiplication: 4(7 + a) = 0 (7 * 4 + a * 4) = 0 (28 + 4a) = 0 Solving 28 + 4a = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-28' to each side of the equation. 28 + -28 + 4a = 0 + -28 Combine like terms: 28 + -28 = 0 0 + 4a = 0 + -28 4a = 0 + -28 Combine like terms: 0 + -28 = -28 4a = -28 Divide each side by '4'. a = -7 Simplifying a = -7
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