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Simplifying 2a + -7 = (-9) Reorder the terms: -7 + 2a = (-9) -7 + 2a = -9 Solving -7 + 2a = -9 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + 2a = -9 + 7 Combine like terms: -7 + 7 = 0 0 + 2a = -9 + 7 2a = -9 + 7 Combine like terms: -9 + 7 = -2 2a = -2 Divide each side by '2'. a = -1 Simplifying a = -1
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