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