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Simplifying 7(x + 3) + 2(4 + x) + -7 = 9x Reorder the terms: 7(3 + x) + 2(4 + x) + -7 = 9x (3 * 7 + x * 7) + 2(4 + x) + -7 = 9x (21 + 7x) + 2(4 + x) + -7 = 9x 21 + 7x + (4 * 2 + x * 2) + -7 = 9x 21 + 7x + (8 + 2x) + -7 = 9x Reorder the terms: 21 + 8 + -7 + 7x + 2x = 9x Combine like terms: 21 + 8 = 29 29 + -7 + 7x + 2x = 9x Combine like terms: 29 + -7 = 22 22 + 7x + 2x = 9x Combine like terms: 7x + 2x = 9x 22 + 9x = 9x Add '-9x' to each side of the equation. 22 + 9x + -9x = 9x + -9x Combine like terms: 9x + -9x = 0 22 + 0 = 9x + -9x 22 = 9x + -9x Combine like terms: 9x + -9x = 0 22 = 0 Solving 22 = 0 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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