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Simplifying 7(z + 4) = 7(z + -2) Reorder the terms: 7(4 + z) = 7(z + -2) (4 * 7 + z * 7) = 7(z + -2) (28 + 7z) = 7(z + -2) Reorder the terms: 28 + 7z = 7(-2 + z) 28 + 7z = (-2 * 7 + z * 7) 28 + 7z = (-14 + 7z) Add '-7z' to each side of the equation. 28 + 7z + -7z = -14 + 7z + -7z Combine like terms: 7z + -7z = 0 28 + 0 = -14 + 7z + -7z 28 = -14 + 7z + -7z Combine like terms: 7z + -7z = 0 28 = -14 + 0 28 = -14 Solving 28 = -14 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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