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Simplifying 7(9n + -1) + 9 = 9(7n + 9) Reorder the terms: 7(-1 + 9n) + 9 = 9(7n + 9) (-1 * 7 + 9n * 7) + 9 = 9(7n + 9) (-7 + 63n) + 9 = 9(7n + 9) Reorder the terms: -7 + 9 + 63n = 9(7n + 9) Combine like terms: -7 + 9 = 2 2 + 63n = 9(7n + 9) Reorder the terms: 2 + 63n = 9(9 + 7n) 2 + 63n = (9 * 9 + 7n * 9) 2 + 63n = (81 + 63n) Add '-63n' to each side of the equation. 2 + 63n + -63n = 81 + 63n + -63n Combine like terms: 63n + -63n = 0 2 + 0 = 81 + 63n + -63n 2 = 81 + 63n + -63n Combine like terms: 63n + -63n = 0 2 = 81 + 0 2 = 81 Solving 2 = 81 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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