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Simplifying -81 = a + 3 Reorder the terms: -81 = 3 + a Solving -81 = 3 + a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1a' to each side of the equation. -81 + -1a = 3 + a + -1a Combine like terms: a + -1a = 0 -81 + -1a = 3 + 0 -81 + -1a = 3 Add '81' to each side of the equation. -81 + 81 + -1a = 3 + 81 Combine like terms: -81 + 81 = 0 0 + -1a = 3 + 81 -1a = 3 + 81 Combine like terms: 3 + 81 = 84 -1a = 84 Divide each side by '-1'. a = -84 Simplifying a = -84
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