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Simplifying x2 + -2a + -99 = 0 Reorder the terms: -99 + -2a + x2 = 0 Solving -99 + -2a + x2 = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '99' to each side of the equation. -99 + -2a + 99 + x2 = 0 + 99 Reorder the terms: -99 + 99 + -2a + x2 = 0 + 99 Combine like terms: -99 + 99 = 0 0 + -2a + x2 = 0 + 99 -2a + x2 = 0 + 99 Combine like terms: 0 + 99 = 99 -2a + x2 = 99 Add '-1x2' to each side of the equation. -2a + x2 + -1x2 = 99 + -1x2 Combine like terms: x2 + -1x2 = 0 -2a + 0 = 99 + -1x2 -2a = 99 + -1x2 Divide each side by '-2'. a = -49.5 + 0.5x2 Simplifying a = -49.5 + 0.5x2
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