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Simplifying x2 + ax + 18 = 0 Reorder the terms: 18 + ax + x2 = 0 Solving 18 + ax + x2 = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-18' to each side of the equation. 18 + ax + -18 + x2 = 0 + -18 Reorder the terms: 18 + -18 + ax + x2 = 0 + -18 Combine like terms: 18 + -18 = 0 0 + ax + x2 = 0 + -18 ax + x2 = 0 + -18 Combine like terms: 0 + -18 = -18 ax + x2 = -18 Add '-1x2' to each side of the equation. ax + x2 + -1x2 = -18 + -1x2 Combine like terms: x2 + -1x2 = 0 ax + 0 = -18 + -1x2 ax = -18 + -1x2 Divide each side by 'x'. a = -18x-1 + -1x Simplifying a = -18x-1 + -1x
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