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Simplifying 7x + 1x + -9 = 2(4x + 9) Reorder the terms: -9 + 7x + 1x = 2(4x + 9) Combine like terms: 7x + 1x = 8x -9 + 8x = 2(4x + 9) Reorder the terms: -9 + 8x = 2(9 + 4x) -9 + 8x = (9 * 2 + 4x * 2) -9 + 8x = (18 + 8x) Add '-8x' to each side of the equation. -9 + 8x + -8x = 18 + 8x + -8x Combine like terms: 8x + -8x = 0 -9 + 0 = 18 + 8x + -8x -9 = 18 + 8x + -8x Combine like terms: 8x + -8x = 0 -9 = 18 + 0 -9 = 18 Solving -9 = 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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