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Simplifying -81 = -3a Solving -81 = -3a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '3a' to each side of the equation. -81 + 3a = -3a + 3a Combine like terms: -3a + 3a = 0 -81 + 3a = 0 Add '81' to each side of the equation. -81 + 81 + 3a = 0 + 81 Combine like terms: -81 + 81 = 0 0 + 3a = 0 + 81 3a = 0 + 81 Combine like terms: 0 + 81 = 81 3a = 81 Divide each side by '3'. a = 27 Simplifying a = 27
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