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Simplifying 12x + 7 + 11x = 2x + 5 + 21x Reorder the terms: 7 + 12x + 11x = 2x + 5 + 21x Combine like terms: 12x + 11x = 23x 7 + 23x = 2x + 5 + 21x Reorder the terms: 7 + 23x = 5 + 2x + 21x Combine like terms: 2x + 21x = 23x 7 + 23x = 5 + 23x Add '-23x' to each side of the equation. 7 + 23x + -23x = 5 + 23x + -23x Combine like terms: 23x + -23x = 0 7 + 0 = 5 + 23x + -23x 7 = 5 + 23x + -23x Combine like terms: 23x + -23x = 0 7 = 5 + 0 7 = 5 Solving 7 = 5 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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