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Simplifying 5x + 15x + -4 = 4(5x + 3) Reorder the terms: -4 + 5x + 15x = 4(5x + 3) Combine like terms: 5x + 15x = 20x -4 + 20x = 4(5x + 3) Reorder the terms: -4 + 20x = 4(3 + 5x) -4 + 20x = (3 * 4 + 5x * 4) -4 + 20x = (12 + 20x) Add '-20x' to each side of the equation. -4 + 20x + -20x = 12 + 20x + -20x Combine like terms: 20x + -20x = 0 -4 + 0 = 12 + 20x + -20x -4 = 12 + 20x + -20x Combine like terms: 20x + -20x = 0 -4 = 12 + 0 -4 = 12 Solving -4 = 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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