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Simplifying 9x + -1(7x + 2) = 3x + 1(2 + -1x) Reorder the terms: 9x + -1(2 + 7x) = 3x + 1(2 + -1x) 9x + (2 * -1 + 7x * -1) = 3x + 1(2 + -1x) 9x + (-2 + -7x) = 3x + 1(2 + -1x) Reorder the terms: -2 + 9x + -7x = 3x + 1(2 + -1x) Combine like terms: 9x + -7x = 2x -2 + 2x = 3x + 1(2 + -1x) -2 + 2x = 3x + (2 * 1 + -1x * 1) -2 + 2x = 3x + (2 + -1x) Reorder the terms: -2 + 2x = 2 + 3x + -1x Combine like terms: 3x + -1x = 2x -2 + 2x = 2 + 2x Add '-2x' to each side of the equation. -2 + 2x + -2x = 2 + 2x + -2x Combine like terms: 2x + -2x = 0 -2 + 0 = 2 + 2x + -2x -2 = 2 + 2x + -2x Combine like terms: 2x + -2x = 0 -2 = 2 + 0 -2 = 2 Solving -2 = 2 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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