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Simplifying 7a + 3b + 9 = 0 Reorder the terms: 9 + 7a + 3b = 0 Solving 9 + 7a + 3b = 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 + 7a + -9 + 3b = 0 + -9 Reorder the terms: 9 + -9 + 7a + 3b = 0 + -9 Combine like terms: 9 + -9 = 0 0 + 7a + 3b = 0 + -9 7a + 3b = 0 + -9 Combine like terms: 0 + -9 = -9 7a + 3b = -9 Add '-3b' to each side of the equation. 7a + 3b + -3b = -9 + -3b Combine like terms: 3b + -3b = 0 7a + 0 = -9 + -3b 7a = -9 + -3b Divide each side by '7'. a = -1.285714286 + -0.4285714286b Simplifying a = -1.285714286 + -0.4285714286b
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