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Simplifying (3x + 4) + (12 + -3x) = 0 Reorder the terms: (4 + 3x) + (12 + -3x) = 0 Remove parenthesis around (4 + 3x) 4 + 3x + (12 + -3x) = 0 Remove parenthesis around (12 + -3x) 4 + 3x + 12 + -3x = 0 Reorder the terms: 4 + 12 + 3x + -3x = 0 Combine like terms: 4 + 12 = 16 16 + 3x + -3x = 0 Combine like terms: 3x + -3x = 0 16 + 0 = 0 16 = 0 Solving 16 = 0 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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