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Simplifying 7(3x + 1) = 21x + 8 Reorder the terms: 7(1 + 3x) = 21x + 8 (1 * 7 + 3x * 7) = 21x + 8 (7 + 21x) = 21x + 8 Reorder the terms: 7 + 21x = 8 + 21x Add '-21x' to each side of the equation. 7 + 21x + -21x = 8 + 21x + -21x Combine like terms: 21x + -21x = 0 7 + 0 = 8 + 21x + -21x 7 = 8 + 21x + -21x Combine like terms: 21x + -21x = 0 7 = 8 + 0 7 = 8 Solving 7 = 8 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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