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Simplifying 81 + 8a = 18 Solving 81 + 8a = 18 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-81' to each side of the equation. 81 + -81 + 8a = 18 + -81 Combine like terms: 81 + -81 = 0 0 + 8a = 18 + -81 8a = 18 + -81 Combine like terms: 18 + -81 = -63 8a = -63 Divide each side by '8'. a = -7.875 Simplifying a = -7.875
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