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Simplifying a + 1 + -1a + 2a = 7 + 3 + 2 Reorder the terms: 1 + a + -1a + 2a = 7 + 3 + 2 Combine like terms: a + -1a = 0 1 + 0 + 2a = 7 + 3 + 2 1 + 2a = 7 + 3 + 2 Combine like terms: 7 + 3 = 10 1 + 2a = 10 + 2 Combine like terms: 10 + 2 = 12 1 + 2a = 12 Solving 1 + 2a = 12 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 2a = 12 + -1 Combine like terms: 1 + -1 = 0 0 + 2a = 12 + -1 2a = 12 + -1 Combine like terms: 12 + -1 = 11 2a = 11 Divide each side by '2'. a = 5.5 Simplifying a = 5.5
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