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Simplifying 6x + 21 = 6x + -69 Reorder the terms: 21 + 6x = 6x + -69 Reorder the terms: 21 + 6x = -69 + 6x Add '-6x' to each side of the equation. 21 + 6x + -6x = -69 + 6x + -6x Combine like terms: 6x + -6x = 0 21 + 0 = -69 + 6x + -6x 21 = -69 + 6x + -6x Combine like terms: 6x + -6x = 0 21 = -69 + 0 21 = -69 Solving 21 = -69 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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