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Simplifying (2a + -5) = 7 Reorder the terms: (-5 + 2a) = 7 Remove parenthesis around (-5 + 2a) -5 + 2a = 7 Solving -5 + 2a = 7 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + 2a = 7 + 5 Combine like terms: -5 + 5 = 0 0 + 2a = 7 + 5 2a = 7 + 5 Combine like terms: 7 + 5 = 12 2a = 12 Divide each side by '2'. a = 6 Simplifying a = 6
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