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Simplifying 2 + -2a = -9 Solving 2 + -2a = -9 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -2a = -9 + -2 Combine like terms: 2 + -2 = 0 0 + -2a = -9 + -2 -2a = -9 + -2 Combine like terms: -9 + -2 = -11 -2a = -11 Divide each side by '-2'. a = 5.5 Simplifying a = 5.5
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