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Simplifying 2a + 7b + -9 = 0 Reorder the terms: -9 + 2a + 7b = 0 Solving -9 + 2a + 7b = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 2a + 9 + 7b = 0 + 9 Reorder the terms: -9 + 9 + 2a + 7b = 0 + 9 Combine like terms: -9 + 9 = 0 0 + 2a + 7b = 0 + 9 2a + 7b = 0 + 9 Combine like terms: 0 + 9 = 9 2a + 7b = 9 Add '-7b' to each side of the equation. 2a + 7b + -7b = 9 + -7b Combine like terms: 7b + -7b = 0 2a + 0 = 9 + -7b 2a = 9 + -7b Divide each side by '2'. a = 4.5 + -3.5b Simplifying a = 4.5 + -3.5b
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