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Simplifying 2(a + -7) = 18 Reorder the terms: 2(-7 + a) = 18 (-7 * 2 + a * 2) = 18 (-14 + 2a) = 18 Solving -14 + 2a = 18 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 = 18 + 14 Combine like terms: -14 + 14 = 0 0 + 2a = 18 + 14 2a = 18 + 14 Combine like terms: 18 + 14 = 32 2a = 32 Divide each side by '2'. a = 16 Simplifying a = 16
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