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