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Simplifying 2(x + -1) + 5x = 7(x + 4) Reorder the terms: 2(-1 + x) + 5x = 7(x + 4) (-1 * 2 + x * 2) + 5x = 7(x + 4) (-2 + 2x) + 5x = 7(x + 4) Combine like terms: 2x + 5x = 7x -2 + 7x = 7(x + 4) Reorder the terms: -2 + 7x = 7(4 + x) -2 + 7x = (4 * 7 + x * 7) -2 + 7x = (28 + 7x) Add '-7x' to each side of the equation. -2 + 7x + -7x = 28 + 7x + -7x Combine like terms: 7x + -7x = 0 -2 + 0 = 28 + 7x + -7x -2 = 28 + 7x + -7x Combine like terms: 7x + -7x = 0 -2 = 28 + 0 -2 = 28 Solving -2 = 28 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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