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