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Simplifying 2(a + 2) + -1a = 7 Reorder the terms: 2(2 + a) + -1a = 7 (2 * 2 + a * 2) + -1a = 7 (4 + 2a) + -1a = 7 Combine like terms: 2a + -1a = 1a 4 + 1a = 7 Solving 4 + 1a = 7 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + 1a = 7 + -4 Combine like terms: 4 + -4 = 0 0 + 1a = 7 + -4 1a = 7 + -4 Combine like terms: 7 + -4 = 3 1a = 3 Divide each side by '1'. a = 3 Simplifying a = 3
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