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Simplifying 12z + -1(4z + 6) = 8z Reorder the terms: 12z + -1(6 + 4z) = 8z 12z + (6 * -1 + 4z * -1) = 8z 12z + (-6 + -4z) = 8z Reorder the terms: -6 + 12z + -4z = 8z Combine like terms: 12z + -4z = 8z -6 + 8z = 8z Add '-8z' to each side of the equation. -6 + 8z + -8z = 8z + -8z Combine like terms: 8z + -8z = 0 -6 + 0 = 8z + -8z -6 = 8z + -8z Combine like terms: 8z + -8z = 0 -6 = 0 Solving -6 = 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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