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Simplifying 7a + -81 = 2a Reorder the terms: -81 + 7a = 2a Solving -81 + 7a = 2a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-2a' to each side of the equation. -81 + 7a + -2a = 2a + -2a Combine like terms: 7a + -2a = 5a -81 + 5a = 2a + -2a Combine like terms: 2a + -2a = 0 -81 + 5a = 0 Add '81' to each side of the equation. -81 + 81 + 5a = 0 + 81 Combine like terms: -81 + 81 = 0 0 + 5a = 0 + 81 5a = 0 + 81 Combine like terms: 0 + 81 = 81 5a = 81 Divide each side by '5'. a = 16.2 Simplifying a = 16.2
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