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Simplifying 19(13a + 20) = 0 Reorder the terms: 19(20 + 13a) = 0 (20 * 19 + 13a * 19) = 0 (380 + 247a) = 0 Solving 380 + 247a = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-380' to each side of the equation. 380 + -380 + 247a = 0 + -380 Combine like terms: 380 + -380 = 0 0 + 247a = 0 + -380 247a = 0 + -380 Combine like terms: 0 + -380 = -380 247a = -380 Divide each side by '247'. a = -1.538461538 Simplifying a = -1.538461538
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