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Simplifying 2a + -17 + 20a + -9(a + 2) = 0 Reorder the terms: 2a + -17 + 20a + -9(2 + a) = 0 2a + -17 + 20a + (2 * -9 + a * -9) = 0 2a + -17 + 20a + (-18 + -9a) = 0 Reorder the terms: -17 + -18 + 2a + 20a + -9a = 0 Combine like terms: -17 + -18 = -35 -35 + 2a + 20a + -9a = 0 Combine like terms: 2a + 20a = 22a -35 + 22a + -9a = 0 Combine like terms: 22a + -9a = 13a -35 + 13a = 0 Solving -35 + 13a = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '35' to each side of the equation. -35 + 35 + 13a = 0 + 35 Combine like terms: -35 + 35 = 0 0 + 13a = 0 + 35 13a = 0 + 35 Combine like terms: 0 + 35 = 35 13a = 35 Divide each side by '13'. a = 2.692307692 Simplifying a = 2.692307692
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