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Simplifying -9a + 4 = -2(a + 5) Reorder the terms: 4 + -9a = -2(a + 5) Reorder the terms: 4 + -9a = -2(5 + a) 4 + -9a = (5 * -2 + a * -2) 4 + -9a = (-10 + -2a) Solving 4 + -9a = -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 + -9a + 2a = -10 + -2a + 2a Combine like terms: -9a + 2a = -7a 4 + -7a = -10 + -2a + 2a Combine like terms: -2a + 2a = 0 4 + -7a = -10 + 0 4 + -7a = -10 Add '-4' to each side of the equation. 4 + -4 + -7a = -10 + -4 Combine like terms: 4 + -4 = 0 0 + -7a = -10 + -4 -7a = -10 + -4 Combine like terms: -10 + -4 = -14 -7a = -14 Divide each side by '-7'. a = 2 Simplifying a = 2
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