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Simplifying 3x + 7x + -7 = 2(5x + 7) Reorder the terms: -7 + 3x + 7x = 2(5x + 7) Combine like terms: 3x + 7x = 10x -7 + 10x = 2(5x + 7) Reorder the terms: -7 + 10x = 2(7 + 5x) -7 + 10x = (7 * 2 + 5x * 2) -7 + 10x = (14 + 10x) Add '-10x' to each side of the equation. -7 + 10x + -10x = 14 + 10x + -10x Combine like terms: 10x + -10x = 0 -7 + 0 = 14 + 10x + -10x -7 = 14 + 10x + -10x Combine like terms: 10x + -10x = 0 -7 = 14 + 0 -7 = 14 Solving -7 = 14 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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