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Simplifying 7x + 13x + -1 = 4(5x + 5) Reorder the terms: -1 + 7x + 13x = 4(5x + 5) Combine like terms: 7x + 13x = 20x -1 + 20x = 4(5x + 5) Reorder the terms: -1 + 20x = 4(5 + 5x) -1 + 20x = (5 * 4 + 5x * 4) -1 + 20x = (20 + 20x) Add '-20x' to each side of the equation. -1 + 20x + -20x = 20 + 20x + -20x Combine like terms: 20x + -20x = 0 -1 + 0 = 20 + 20x + -20x -1 = 20 + 20x + -20x Combine like terms: 20x + -20x = 0 -1 = 20 + 0 -1 = 20 Solving -1 = 20 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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