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Simplifying a + 2a + -1 = 11 Reorder the terms: -1 + a + 2a = 11 Combine like terms: a + 2a = 3a -1 + 3a = 11 Solving -1 + 3a = 11 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + 3a = 11 + 1 Combine like terms: -1 + 1 = 0 0 + 3a = 11 + 1 3a = 11 + 1 Combine like terms: 11 + 1 = 12 3a = 12 Divide each side by '3'. a = 4 Simplifying a = 4
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