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Simplifying -3 = 27a + -3(2a + -3) Reorder the terms: -3 = 27a + -3(-3 + 2a) -3 = 27a + (-3 * -3 + 2a * -3) -3 = 27a + (9 + -6a) Reorder the terms: -3 = 9 + 27a + -6a Combine like terms: 27a + -6a = 21a -3 = 9 + 21a Solving -3 = 9 + 21a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-21a' to each side of the equation. -3 + -21a = 9 + 21a + -21a Combine like terms: 21a + -21a = 0 -3 + -21a = 9 + 0 -3 + -21a = 9 Add '3' to each side of the equation. -3 + 3 + -21a = 9 + 3 Combine like terms: -3 + 3 = 0 0 + -21a = 9 + 3 -21a = 9 + 3 Combine like terms: 9 + 3 = 12 -21a = 12 Divide each side by '-21'. a = -0.5714285714 Simplifying a = -0.5714285714
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