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Simplifying 2 + 0.5(a + -1) = -1 Reorder the terms: 2 + 0.5(-1 + a) = -1 2 + (-1 * 0.5 + a * 0.5) = -1 2 + (-0.5 + 0.5a) = -1 Combine like terms: 2 + -0.5 = 1.5 1.5 + 0.5a = -1 Solving 1.5 + 0.5a = -1 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + 0.5a = -1 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + 0.5a = -1 + -1.5 0.5a = -1 + -1.5 Combine like terms: -1 + -1.5 = -2.5 0.5a = -2.5 Divide each side by '0.5'. a = -5 Simplifying a = -5
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