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Simplifying (2x + 5) + (x + 1) = 3(x + -1) + 7 Reorder the terms: (5 + 2x) + (x + 1) = 3(x + -1) + 7 Remove parenthesis around (5 + 2x) 5 + 2x + (x + 1) = 3(x + -1) + 7 Reorder the terms: 5 + 2x + (1 + x) = 3(x + -1) + 7 Remove parenthesis around (1 + x) 5 + 2x + 1 + x = 3(x + -1) + 7 Reorder the terms: 5 + 1 + 2x + x = 3(x + -1) + 7 Combine like terms: 5 + 1 = 6 6 + 2x + x = 3(x + -1) + 7 Combine like terms: 2x + x = 3x 6 + 3x = 3(x + -1) + 7 Reorder the terms: 6 + 3x = 3(-1 + x) + 7 6 + 3x = (-1 * 3 + x * 3) + 7 6 + 3x = (-3 + 3x) + 7 Reorder the terms: 6 + 3x = -3 + 7 + 3x Combine like terms: -3 + 7 = 4 6 + 3x = 4 + 3x Add '-3x' to each side of the equation. 6 + 3x + -3x = 4 + 3x + -3x Combine like terms: 3x + -3x = 0 6 + 0 = 4 + 3x + -3x 6 = 4 + 3x + -3x Combine like terms: 3x + -3x = 0 6 = 4 + 0 6 = 4 Solving 6 = 4 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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