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Simplifying -5(a + 5) + 45 = 40 Reorder the terms: -5(5 + a) + 45 = 40 (5 * -5 + a * -5) + 45 = 40 (-25 + -5a) + 45 = 40 Reorder the terms: -25 + 45 + -5a = 40 Combine like terms: -25 + 45 = 20 20 + -5a = 40 Solving 20 + -5a = 40 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + -5a = 40 + -20 Combine like terms: 20 + -20 = 0 0 + -5a = 40 + -20 -5a = 40 + -20 Combine like terms: 40 + -20 = 20 -5a = 20 Divide each side by '-5'. a = -4 Simplifying a = -4
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