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Simplifying 5(4x + 7) = 20(x + 9) + -7 Reorder the terms: 5(7 + 4x) = 20(x + 9) + -7 (7 * 5 + 4x * 5) = 20(x + 9) + -7 (35 + 20x) = 20(x + 9) + -7 Reorder the terms: 35 + 20x = 20(9 + x) + -7 35 + 20x = (9 * 20 + x * 20) + -7 35 + 20x = (180 + 20x) + -7 Reorder the terms: 35 + 20x = 180 + -7 + 20x Combine like terms: 180 + -7 = 173 35 + 20x = 173 + 20x Add '-20x' to each side of the equation. 35 + 20x + -20x = 173 + 20x + -20x Combine like terms: 20x + -20x = 0 35 + 0 = 173 + 20x + -20x 35 = 173 + 20x + -20x Combine like terms: 20x + -20x = 0 35 = 173 + 0 35 = 173 Solving 35 = 173 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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