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Simplifying 2(a2 + -4) + 15 = 0 Reorder the terms: 2(-4 + a2) + 15 = 0 (-4 * 2 + a2 * 2) + 15 = 0 (-8 + 2a2) + 15 = 0 Reorder the terms: -8 + 15 + 2a2 = 0 Combine like terms: -8 + 15 = 7 7 + 2a2 = 0 Solving 7 + 2a2 = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 2a2 = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 2a2 = 0 + -7 2a2 = 0 + -7 Combine like terms: 0 + -7 = -7 2a2 = -7 Divide each side by '2'. a2 = -3.5 Simplifying a2 = -3.5 Reorder the terms: 3.5 + a2 = -3.5 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 3.5 + a2 = 0.0 The solution to this equation could not be determined.
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