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Simplifying 3 = 2(a + -5) + -5 Reorder the terms: 3 = 2(-5 + a) + -5 3 = (-5 * 2 + a * 2) + -5 3 = (-10 + 2a) + -5 Reorder the terms: 3 = -10 + -5 + 2a Combine like terms: -10 + -5 = -15 3 = -15 + 2a Solving 3 = -15 + 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. 3 + -2a = -15 + 2a + -2a Combine like terms: 2a + -2a = 0 3 + -2a = -15 + 0 3 + -2a = -15 Add '-3' to each side of the equation. 3 + -3 + -2a = -15 + -3 Combine like terms: 3 + -3 = 0 0 + -2a = -15 + -3 -2a = -15 + -3 Combine like terms: -15 + -3 = -18 -2a = -18 Divide each side by '-2'. a = 9 Simplifying a = 9
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