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