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Simplifying -28 + -8a = -3(1 + a) -28 + -8a = (1 * -3 + a * -3) -28 + -8a = (-3 + -3a) Solving -28 + -8a = -3 + -3a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '3a' to each side of the equation. -28 + -8a + 3a = -3 + -3a + 3a Combine like terms: -8a + 3a = -5a -28 + -5a = -3 + -3a + 3a Combine like terms: -3a + 3a = 0 -28 + -5a = -3 + 0 -28 + -5a = -3 Add '28' to each side of the equation. -28 + 28 + -5a = -3 + 28 Combine like terms: -28 + 28 = 0 0 + -5a = -3 + 28 -5a = -3 + 28 Combine like terms: -3 + 28 = 25 -5a = 25 Divide each side by '-5'. a = -5 Simplifying a = -5
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