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Simplifying 3 + z = 9 + z Add '-1z' to each side of the equation. 3 + z + -1z = 9 + z + -1z Combine like terms: z + -1z = 0 3 + 0 = 9 + z + -1z 3 = 9 + z + -1z Combine like terms: z + -1z = 0 3 = 9 + 0 3 = 9 Solving 3 = 9 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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