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Simplifying -3(7 + x) + 8 = -3(x + 7) (7 * -3 + x * -3) + 8 = -3(x + 7) (-21 + -3x) + 8 = -3(x + 7) Reorder the terms: -21 + 8 + -3x = -3(x + 7) Combine like terms: -21 + 8 = -13 -13 + -3x = -3(x + 7) Reorder the terms: -13 + -3x = -3(7 + x) -13 + -3x = (7 * -3 + x * -3) -13 + -3x = (-21 + -3x) Add '3x' to each side of the equation. -13 + -3x + 3x = -21 + -3x + 3x Combine like terms: -3x + 3x = 0 -13 + 0 = -21 + -3x + 3x -13 = -21 + -3x + 3x Combine like terms: -3x + 3x = 0 -13 = -21 + 0 -13 = -21 Solving -13 = -21 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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