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Simplifying x + 2x + 3x = 3(2x + 7) Combine like terms: x + 2x = 3x 3x + 3x = 3(2x + 7) Combine like terms: 3x + 3x = 6x 6x = 3(2x + 7) Reorder the terms: 6x = 3(7 + 2x) 6x = (7 * 3 + 2x * 3) 6x = (21 + 6x) Add '-6x' to each side of the equation. 6x + -6x = 21 + 6x + -6x Combine like terms: 6x + -6x = 0 0 = 21 + 6x + -6x Combine like terms: 6x + -6x = 0 0 = 21 + 0 0 = 21 Solving 0 = 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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