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Simplifying -2(7 + a) = -12 (7 * -2 + a * -2) = -12 (-14 + -2a) = -12 Solving -14 + -2a = -12 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '14' to each side of the equation. -14 + 14 + -2a = -12 + 14 Combine like terms: -14 + 14 = 0 0 + -2a = -12 + 14 -2a = -12 + 14 Combine like terms: -12 + 14 = 2 -2a = 2 Divide each side by '-2'. a = -1 Simplifying a = -1
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