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Simplifying 4 = -2(a + 5) Reorder the terms: 4 = -2(5 + a) 4 = (5 * -2 + a * -2) 4 = (-10 + -2a) Solving 4 = -10 + -2a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '2a' to each side of the equation. 4 + 2a = -10 + -2a + 2a Combine like terms: -2a + 2a = 0 4 + 2a = -10 + 0 4 + 2a = -10 Add '-4' to each side of the equation. 4 + -4 + 2a = -10 + -4 Combine like terms: 4 + -4 = 0 0 + 2a = -10 + -4 2a = -10 + -4 Combine like terms: -10 + -4 = -14 2a = -14 Divide each side by '2'. a = -7 Simplifying a = -7
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