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Simplifying 7x + 13x = 7 + 5(4x + 1) Combine like terms: 7x + 13x = 20x 20x = 7 + 5(4x + 1) Reorder the terms: 20x = 7 + 5(1 + 4x) 20x = 7 + (1 * 5 + 4x * 5) 20x = 7 + (5 + 20x) Combine like terms: 7 + 5 = 12 20x = 12 + 20x Add '-20x' to each side of the equation. 20x + -20x = 12 + 20x + -20x Combine like terms: 20x + -20x = 0 0 = 12 + 20x + -20x Combine like terms: 20x + -20x = 0 0 = 12 + 0 0 = 12 Solving 0 = 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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