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Simplifying 7(z + 4) = 6(z + -7) + z Reorder the terms: 7(4 + z) = 6(z + -7) + z (4 * 7 + z * 7) = 6(z + -7) + z (28 + 7z) = 6(z + -7) + z Reorder the terms: 28 + 7z = 6(-7 + z) + z 28 + 7z = (-7 * 6 + z * 6) + z 28 + 7z = (-42 + 6z) + z Combine like terms: 6z + z = 7z 28 + 7z = -42 + 7z Add '-7z' to each side of the equation. 28 + 7z + -7z = -42 + 7z + -7z Combine like terms: 7z + -7z = 0 28 + 0 = -42 + 7z + -7z 28 = -42 + 7z + -7z Combine like terms: 7z + -7z = 0 28 = -42 + 0 28 = -42 Solving 28 = -42 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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