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Simplifying 20x + 15 = 7(3x + 2) + -1x Reorder the terms: 15 + 20x = 7(3x + 2) + -1x Reorder the terms: 15 + 20x = 7(2 + 3x) + -1x 15 + 20x = (2 * 7 + 3x * 7) + -1x 15 + 20x = (14 + 21x) + -1x Combine like terms: 21x + -1x = 20x 15 + 20x = 14 + 20x Add '-20x' to each side of the equation. 15 + 20x + -20x = 14 + 20x + -20x Combine like terms: 20x + -20x = 0 15 + 0 = 14 + 20x + -20x 15 = 14 + 20x + -20x Combine like terms: 20x + -20x = 0 15 = 14 + 0 15 = 14 Solving 15 = 14 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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