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Simplifying 7 + 15x = 3(5x + 3) Reorder the terms: 7 + 15x = 3(3 + 5x) 7 + 15x = (3 * 3 + 5x * 3) 7 + 15x = (9 + 15x) Add '-15x' to each side of the equation. 7 + 15x + -15x = 9 + 15x + -15x Combine like terms: 15x + -15x = 0 7 + 0 = 9 + 15x + -15x 7 = 9 + 15x + -15x Combine like terms: 15x + -15x = 0 7 = 9 + 0 7 = 9 Solving 7 = 9 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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