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Simplifying 18 + 3 = 54 + 27 Combine like terms: 18 + 3 = 21 21 = 54 + 27 Combine like terms: 54 + 27 = 81 21 = 81 Solving 21 = 81 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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