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Simplifying 8 = a + -1(-27) Multiply -1 * -27 8 = a + 27 Reorder the terms: 8 = 27 + a Solving 8 = 27 + a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1a' to each side of the equation. 8 + -1a = 27 + a + -1a Combine like terms: a + -1a = 0 8 + -1a = 27 + 0 8 + -1a = 27 Add '-8' to each side of the equation. 8 + -8 + -1a = 27 + -8 Combine like terms: 8 + -8 = 0 0 + -1a = 27 + -8 -1a = 27 + -8 Combine like terms: 27 + -8 = 19 -1a = 19 Divide each side by '-1'. a = -19 Simplifying a = -19
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