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Simplifying 7 + -23 = 4x + -4 + -4x Combine like terms: 7 + -23 = -16 -16 = 4x + -4 + -4x Reorder the terms: -16 = -4 + 4x + -4x Combine like terms: 4x + -4x = 0 -16 = -4 + 0 -16 = -4 Solving -16 = -4 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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