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Simplifying 4x + 16x + -7 = 4[5x + 7] Reorder the terms: -7 + 4x + 16x = 4[5x + 7] Combine like terms: 4x + 16x = 20x -7 + 20x = 4[5x + 7] Reorder the terms: -7 + 20x = 4[7 + 5x] -7 + 20x = [7 * 4 + 5x * 4] -7 + 20x = [28 + 20x] Add '-20x' to each side of the equation. -7 + 20x + -20x = 28 + 20x + -20x Combine like terms: 20x + -20x = 0 -7 + 0 = 28 + 20x + -20x -7 = 28 + 20x + -20x Combine like terms: 20x + -20x = 0 -7 = 28 + 0 -7 = 28 Solving -7 = 28 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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