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Simplifying 2a + -1 = 7 Reorder the terms: -1 + 2a = 7 Solving -1 + 2a = 7 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 + 2a = 7 + 1 Combine like terms: -1 + 1 = 0 0 + 2a = 7 + 1 2a = 7 + 1 Combine like terms: 7 + 1 = 8 2a = 8 Divide each side by '2'. a = 4 Simplifying a = 4
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