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Simplifying 12x + 21 = 3(4x + 6) Reorder the terms: 21 + 12x = 3(4x + 6) Reorder the terms: 21 + 12x = 3(6 + 4x) 21 + 12x = (6 * 3 + 4x * 3) 21 + 12x = (18 + 12x) Add '-12x' to each side of the equation. 21 + 12x + -12x = 18 + 12x + -12x Combine like terms: 12x + -12x = 0 21 + 0 = 18 + 12x + -12x 21 = 18 + 12x + -12x Combine like terms: 12x + -12x = 0 21 = 18 + 0 21 = 18 Solving 21 = 18 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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