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Simplifying x + -1 = x + -2 + 21 Reorder the terms: -1 + x = x + -2 + 21 Reorder the terms: -1 + x = -2 + 21 + x Combine like terms: -2 + 21 = 19 -1 + x = 19 + x Add '-1x' to each side of the equation. -1 + x + -1x = 19 + x + -1x Combine like terms: x + -1x = 0 -1 + 0 = 19 + x + -1x -1 = 19 + x + -1x Combine like terms: x + -1x = 0 -1 = 19 + 0 -1 = 19 Solving -1 = 19 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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