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Simplifying 5x + 15x + -7 = 5(4x + 8) Reorder the terms: -7 + 5x + 15x = 5(4x + 8) Combine like terms: 5x + 15x = 20x -7 + 20x = 5(4x + 8) Reorder the terms: -7 + 20x = 5(8 + 4x) -7 + 20x = (8 * 5 + 4x * 5) -7 + 20x = (40 + 20x) Add '-20x' to each side of the equation. -7 + 20x + -20x = 40 + 20x + -20x Combine like terms: 20x + -20x = 0 -7 + 0 = 40 + 20x + -20x -7 = 40 + 20x + -20x Combine like terms: 20x + -20x = 0 -7 = 40 + 0 -7 = 40 Solving -7 = 40 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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