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Simplifying 21x + -18 = 21x + -48 Reorder the terms: -18 + 21x = 21x + -48 Reorder the terms: -18 + 21x = -48 + 21x Add '-21x' to each side of the equation. -18 + 21x + -21x = -48 + 21x + -21x Combine like terms: 21x + -21x = 0 -18 + 0 = -48 + 21x + -21x -18 = -48 + 21x + -21x Combine like terms: 21x + -21x = 0 -18 = -48 + 0 -18 = -48 Solving -18 = -48 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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