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Simplifying (x + -4) = (x + 7) Reorder the terms: (-4 + x) = (x + 7) Remove parenthesis around (-4 + x) -4 + x = (x + 7) Reorder the terms: -4 + x = (7 + x) Remove parenthesis around (7 + x) -4 + x = 7 + x Add '-1x' to each side of the equation. -4 + x + -1x = 7 + x + -1x Combine like terms: x + -1x = 0 -4 + 0 = 7 + x + -1x -4 = 7 + x + -1x Combine like terms: x + -1x = 0 -4 = 7 + 0 -4 = 7 Solving -4 = 7 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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