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Simplifying 5x + -7(x + -1) = -2x Reorder the terms: 5x + -7(-1 + x) = -2x 5x + (-1 * -7 + x * -7) = -2x 5x + (7 + -7x) = -2x Reorder the terms: 7 + 5x + -7x = -2x Combine like terms: 5x + -7x = -2x 7 + -2x = -2x Add '2x' to each side of the equation. 7 + -2x + 2x = -2x + 2x Combine like terms: -2x + 2x = 0 7 + 0 = -2x + 2x 7 = -2x + 2x Combine like terms: -2x + 2x = 0 7 = 0 Solving 7 = 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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