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Simplifying 9(x + 9) + 7 = 9x + 9 Reorder the terms: 9(9 + x) + 7 = 9x + 9 (9 * 9 + x * 9) + 7 = 9x + 9 (81 + 9x) + 7 = 9x + 9 Reorder the terms: 81 + 7 + 9x = 9x + 9 Combine like terms: 81 + 7 = 88 88 + 9x = 9x + 9 Reorder the terms: 88 + 9x = 9 + 9x Add '-9x' to each side of the equation. 88 + 9x + -9x = 9 + 9x + -9x Combine like terms: 9x + -9x = 0 88 + 0 = 9 + 9x + -9x 88 = 9 + 9x + -9x Combine like terms: 9x + -9x = 0 88 = 9 + 0 88 = 9 Solving 88 = 9 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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