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Simplifying 8.1 = -7a + 2.1 Reorder the terms: 8.1 = 2.1 + -7a Solving 8.1 = 2.1 + -7a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '7a' to each side of the equation. 8.1 + 7a = 2.1 + -7a + 7a Combine like terms: -7a + 7a = 0 8.1 + 7a = 2.1 + 0 8.1 + 7a = 2.1 Add '-8.1' to each side of the equation. 8.1 + -8.1 + 7a = 2.1 + -8.1 Combine like terms: 8.1 + -8.1 = 0.0 0.0 + 7a = 2.1 + -8.1 7a = 2.1 + -8.1 Combine like terms: 2.1 + -8.1 = -6 7a = -6 Divide each side by '7'. a = -0.8571428571 Simplifying a = -0.8571428571
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