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Simplifying a + (2a + -3) = 279 Reorder the terms: a + (-3 + 2a) = 279 Remove parenthesis around (-3 + 2a) a + -3 + 2a = 279 Reorder the terms: -3 + a + 2a = 279 Combine like terms: a + 2a = 3a -3 + 3a = 279 Solving -3 + 3a = 279 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + 3a = 279 + 3 Combine like terms: -3 + 3 = 0 0 + 3a = 279 + 3 3a = 279 + 3 Combine like terms: 279 + 3 = 282 3a = 282 Divide each side by '3'. a = 94 Simplifying a = 94
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