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Simplifying 5(x + 3) = x + 4x + 12 Reorder the terms: 5(3 + x) = x + 4x + 12 (3 * 5 + x * 5) = x + 4x + 12 (15 + 5x) = x + 4x + 12 Reorder the terms: 15 + 5x = 12 + x + 4x Combine like terms: x + 4x = 5x 15 + 5x = 12 + 5x Add '-5x' to each side of the equation. 15 + 5x + -5x = 12 + 5x + -5x Combine like terms: 5x + -5x = 0 15 + 0 = 12 + 5x + -5x 15 = 12 + 5x + -5x Combine like terms: 5x + -5x = 0 15 = 12 + 0 15 = 12 Solving 15 = 12 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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