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Simplifying -4x2 + 4a + 15 = 0 Reorder the terms: 15 + 4a + -4x2 = 0 Solving 15 + 4a + -4x2 = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + 4a + -15 + -4x2 = 0 + -15 Reorder the terms: 15 + -15 + 4a + -4x2 = 0 + -15 Combine like terms: 15 + -15 = 0 0 + 4a + -4x2 = 0 + -15 4a + -4x2 = 0 + -15 Combine like terms: 0 + -15 = -15 4a + -4x2 = -15 Add '4x2' to each side of the equation. 4a + -4x2 + 4x2 = -15 + 4x2 Combine like terms: -4x2 + 4x2 = 0 4a + 0 = -15 + 4x2 4a = -15 + 4x2 Divide each side by '4'. a = -3.75 + x2 Simplifying a = -3.75 + x2
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