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Simplifying 3x + 18 = 3x + -18 Reorder the terms: 18 + 3x = 3x + -18 Reorder the terms: 18 + 3x = -18 + 3x Add '-3x' to each side of the equation. 18 + 3x + -3x = -18 + 3x + -3x Combine like terms: 3x + -3x = 0 18 + 0 = -18 + 3x + -3x 18 = -18 + 3x + -3x Combine like terms: 3x + -3x = 0 18 = -18 + 0 18 = -18 Solving 18 = -18 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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