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Simplifying -2(a + 3) + 49 = 18 Reorder the terms: -2(3 + a) + 49 = 18 (3 * -2 + a * -2) + 49 = 18 (-6 + -2a) + 49 = 18 Reorder the terms: -6 + 49 + -2a = 18 Combine like terms: -6 + 49 = 43 43 + -2a = 18 Solving 43 + -2a = 18 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-43' to each side of the equation. 43 + -43 + -2a = 18 + -43 Combine like terms: 43 + -43 = 0 0 + -2a = 18 + -43 -2a = 18 + -43 Combine like terms: 18 + -43 = -25 -2a = -25 Divide each side by '-2'. a = 12.5 Simplifying a = 12.5
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