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Simplifying x + 8 = (x + 21) Reorder the terms: 8 + x = (x + 21) Reorder the terms: 8 + x = (21 + x) Remove parenthesis around (21 + x) 8 + x = 21 + x Add '-1x' to each side of the equation. 8 + x + -1x = 21 + x + -1x Combine like terms: x + -1x = 0 8 + 0 = 21 + x + -1x 8 = 21 + x + -1x Combine like terms: x + -1x = 0 8 = 21 + 0 8 = 21 Solving 8 = 21 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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