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Simplifying 189 = -3(1 + -8a) 189 = (1 * -3 + -8a * -3) 189 = (-3 + 24a) Solving 189 = -3 + 24a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-24a' to each side of the equation. 189 + -24a = -3 + 24a + -24a Combine like terms: 24a + -24a = 0 189 + -24a = -3 + 0 189 + -24a = -3 Add '-189' to each side of the equation. 189 + -189 + -24a = -3 + -189 Combine like terms: 189 + -189 = 0 0 + -24a = -3 + -189 -24a = -3 + -189 Combine like terms: -3 + -189 = -192 -24a = -192 Divide each side by '-24'. a = 8 Simplifying a = 8
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