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Simplifying -2a + -9 = -5a + 9 Reorder the terms: -9 + -2a = -5a + 9 Reorder the terms: -9 + -2a = 9 + -5a Solving -9 + -2a = 9 + -5a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '5a' to each side of the equation. -9 + -2a + 5a = 9 + -5a + 5a Combine like terms: -2a + 5a = 3a -9 + 3a = 9 + -5a + 5a Combine like terms: -5a + 5a = 0 -9 + 3a = 9 + 0 -9 + 3a = 9 Add '9' to each side of the equation. -9 + 9 + 3a = 9 + 9 Combine like terms: -9 + 9 = 0 0 + 3a = 9 + 9 3a = 9 + 9 Combine like terms: 9 + 9 = 18 3a = 18 Divide each side by '3'. a = 6 Simplifying a = 6
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