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Simplifying 15 + -2a + 2 = 0 Reorder the terms: 15 + 2 + -2a = 0 Combine like terms: 15 + 2 = 17 17 + -2a = 0 Solving 17 + -2a = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-17' to each side of the equation. 17 + -17 + -2a = 0 + -17 Combine like terms: 17 + -17 = 0 0 + -2a = 0 + -17 -2a = 0 + -17 Combine like terms: 0 + -17 = -17 -2a = -17 Divide each side by '-2'. a = 8.5 Simplifying a = 8.5
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