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Simplifying 12a + 21b = 0 Solving 12a + 21b = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-21b' to each side of the equation. 12a + 21b + -21b = 0 + -21b Combine like terms: 21b + -21b = 0 12a + 0 = 0 + -21b 12a = 0 + -21b Remove the zero: 12a = -21b Divide each side by '12'. a = -1.75b Simplifying a = -1.75b
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