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Simplifying (15 + 7x) + -7x = 0 Remove parenthesis around (15 + 7x) 15 + 7x + -7x = 0 Combine like terms: 7x + -7x = 0 15 + 0 = 0 15 = 0 Solving 15 = 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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