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Simplifying 9(x + 3) + -7 = 3x + 6(3 + x) Reorder the terms: 9(3 + x) + -7 = 3x + 6(3 + x) (3 * 9 + x * 9) + -7 = 3x + 6(3 + x) (27 + 9x) + -7 = 3x + 6(3 + x) Reorder the terms: 27 + -7 + 9x = 3x + 6(3 + x) Combine like terms: 27 + -7 = 20 20 + 9x = 3x + 6(3 + x) 20 + 9x = 3x + (3 * 6 + x * 6) 20 + 9x = 3x + (18 + 6x) Reorder the terms: 20 + 9x = 18 + 3x + 6x Combine like terms: 3x + 6x = 9x 20 + 9x = 18 + 9x Add '-9x' to each side of the equation. 20 + 9x + -9x = 18 + 9x + -9x Combine like terms: 9x + -9x = 0 20 + 0 = 18 + 9x + -9x 20 = 18 + 9x + -9x Combine like terms: 9x + -9x = 0 20 = 18 + 0 20 = 18 Solving 20 = 18 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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