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Simplifying 2a + 7b + -9a + -4b = 0 Reorder the terms: 2a + -9a + 7b + -4b = 0 Combine like terms: 2a + -9a = -7a -7a + 7b + -4b = 0 Combine like terms: 7b + -4b = 3b -7a + 3b = 0 Solving -7a + 3b = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-3b' to each side of the equation. -7a + 3b + -3b = 0 + -3b Combine like terms: 3b + -3b = 0 -7a + 0 = 0 + -3b -7a = 0 + -3b Remove the zero: -7a = -3b Divide each side by '-7'. a = 0.4285714286b Simplifying a = 0.4285714286b
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