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Simplifying 0 = 6a + 9b + -1a + 12b + 2a Reorder the terms: 0 = 6a + -1a + 2a + 9b + 12b Combine like terms: 6a + -1a = 5a 0 = 5a + 2a + 9b + 12b Combine like terms: 5a + 2a = 7a 0 = 7a + 9b + 12b Combine like terms: 9b + 12b = 21b 0 = 7a + 21b Solving 0 = 7a + 21b Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-7a' to each side of the equation. 0 + -7a = 7a + -7a + 21b Remove the zero: -7a = 7a + -7a + 21b Combine like terms: 7a + -7a = 0 -7a = 0 + 21b -7a = 21b Divide each side by '-7'. a = -3b Simplifying a = -3b
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