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Simplifying 2(4a + -9) + 7 = -9 Reorder the terms: 2(-9 + 4a) + 7 = -9 (-9 * 2 + 4a * 2) + 7 = -9 (-18 + 8a) + 7 = -9 Reorder the terms: -18 + 7 + 8a = -9 Combine like terms: -18 + 7 = -11 -11 + 8a = -9 Solving -11 + 8a = -9 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '11' to each side of the equation. -11 + 11 + 8a = -9 + 11 Combine like terms: -11 + 11 = 0 0 + 8a = -9 + 11 8a = -9 + 11 Combine like terms: -9 + 11 = 2 8a = 2 Divide each side by '8'. a = 0.25 Simplifying a = 0.25
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