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Simplifying 7x + 9x + -1 = 4(4x + 9) Reorder the terms: -1 + 7x + 9x = 4(4x + 9) Combine like terms: 7x + 9x = 16x -1 + 16x = 4(4x + 9) Reorder the terms: -1 + 16x = 4(9 + 4x) -1 + 16x = (9 * 4 + 4x * 4) -1 + 16x = (36 + 16x) Add '-16x' to each side of the equation. -1 + 16x + -16x = 36 + 16x + -16x Combine like terms: 16x + -16x = 0 -1 + 0 = 36 + 16x + -16x -1 = 36 + 16x + -16x Combine like terms: 16x + -16x = 0 -1 = 36 + 0 -1 = 36 Solving -1 = 36 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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