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Simplifying 7 + 2a + 6 = -9 Reorder the terms: 7 + 6 + 2a = -9 Combine like terms: 7 + 6 = 13 13 + 2a = -9 Solving 13 + 2a = -9 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-13' to each side of the equation. 13 + -13 + 2a = -9 + -13 Combine like terms: 13 + -13 = 0 0 + 2a = -9 + -13 2a = -9 + -13 Combine like terms: -9 + -13 = -22 2a = -22 Divide each side by '2'. a = -11 Simplifying a = -11
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