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Simplifying 5 = 2(a + -1) Reorder the terms: 5 = 2(-1 + a) 5 = (-1 * 2 + a * 2) 5 = (-2 + 2a) Solving 5 = -2 + 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. 5 + -2a = -2 + 2a + -2a Combine like terms: 2a + -2a = 0 5 + -2a = -2 + 0 5 + -2a = -2 Add '-5' to each side of the equation. 5 + -5 + -2a = -2 + -5 Combine like terms: 5 + -5 = 0 0 + -2a = -2 + -5 -2a = -2 + -5 Combine like terms: -2 + -5 = -7 -2a = -7 Divide each side by '-2'. a = 3.5 Simplifying a = 3.5
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