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Simplifying 7(z + 6) = 7(z + -3) Reorder the terms: 7(6 + z) = 7(z + -3) (6 * 7 + z * 7) = 7(z + -3) (42 + 7z) = 7(z + -3) Reorder the terms: 42 + 7z = 7(-3 + z) 42 + 7z = (-3 * 7 + z * 7) 42 + 7z = (-21 + 7z) Add '-7z' to each side of the equation. 42 + 7z + -7z = -21 + 7z + -7z Combine like terms: 7z + -7z = 0 42 + 0 = -21 + 7z + -7z 42 = -21 + 7z + -7z Combine like terms: 7z + -7z = 0 42 = -21 + 0 42 = -21 Solving 42 = -21 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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