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Simplifying x2 + x + -18 = x2 + x Reorder the terms: -18 + x + x2 = x2 + x Reorder the terms: -18 + x + x2 = x + x2 Add '-1x' to each side of the equation. -18 + x + -1x + x2 = x + -1x + x2 Combine like terms: x + -1x = 0 -18 + 0 + x2 = x + -1x + x2 -18 + x2 = x + -1x + x2 Combine like terms: x + -1x = 0 -18 + x2 = 0 + x2 -18 + x2 = x2 Add '-1x2' to each side of the equation. -18 + x2 + -1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -18 + 0 = x2 + -1x2 -18 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -18 = 0 Solving -18 = 0 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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