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Simplifying 15x + 7 = 15x + -7 Reorder the terms: 7 + 15x = 15x + -7 Reorder the terms: 7 + 15x = -7 + 15x Add '-15x' to each side of the equation. 7 + 15x + -15x = -7 + 15x + -15x Combine like terms: 15x + -15x = 0 7 + 0 = -7 + 15x + -15x 7 = -7 + 15x + -15x Combine like terms: 15x + -15x = 0 7 = -7 + 0 7 = -7 Solving 7 = -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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