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Simplifying -2a + 9 = 7 + -4a Reorder the terms: 9 + -2a = 7 + -4a Solving 9 + -2a = 7 + -4a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '4a' to each side of the equation. 9 + -2a + 4a = 7 + -4a + 4a Combine like terms: -2a + 4a = 2a 9 + 2a = 7 + -4a + 4a Combine like terms: -4a + 4a = 0 9 + 2a = 7 + 0 9 + 2a = 7 Add '-9' to each side of the equation. 9 + -9 + 2a = 7 + -9 Combine like terms: 9 + -9 = 0 0 + 2a = 7 + -9 2a = 7 + -9 Combine like terms: 7 + -9 = -2 2a = -2 Divide each side by '2'. a = -1 Simplifying a = -1
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