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Simplifying 9(2 + -7a) = -16 (2 * 9 + -7a * 9) = -16 (18 + -63a) = -16 Solving 18 + -63a = -16 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-18' to each side of the equation. 18 + -18 + -63a = -16 + -18 Combine like terms: 18 + -18 = 0 0 + -63a = -16 + -18 -63a = -16 + -18 Combine like terms: -16 + -18 = -34 -63a = -34 Divide each side by '-63'. a = 0.5396825397 Simplifying a = 0.5396825397
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