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Simplifying 2 + 9c(7a + b) + -2 = 0 2 + (7a * 9c + b * 9c) + -2 = 0 2 + (63ac + 9bc) + -2 = 0 Reorder the terms: 2 + -2 + 63ac + 9bc = 0 Combine like terms: 2 + -2 = 0 0 + 63ac + 9bc = 0 63ac + 9bc = 0 Solving 63ac + 9bc = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-9bc' to each side of the equation. 63ac + 9bc + -9bc = 0 + -9bc Combine like terms: 9bc + -9bc = 0 63ac + 0 = 0 + -9bc 63ac = 0 + -9bc Remove the zero: 63ac = -9bc Divide each side by '63c'. a = -0.1428571429b Simplifying a = -0.1428571429b
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