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Simplifying 2(-5a + 7) = -9 Reorder the terms: 2(7 + -5a) = -9 (7 * 2 + -5a * 2) = -9 (14 + -10a) = -9 Solving 14 + -10a = -9 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 + -10a = -9 + -14 Combine like terms: 14 + -14 = 0 0 + -10a = -9 + -14 -10a = -9 + -14 Combine like terms: -9 + -14 = -23 -10a = -23 Divide each side by '-10'. a = 2.3 Simplifying a = 2.3
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