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Simplifying -7(3x + -3) + 6 = -21x + 7 Reorder the terms: -7(-3 + 3x) + 6 = -21x + 7 (-3 * -7 + 3x * -7) + 6 = -21x + 7 (21 + -21x) + 6 = -21x + 7 Reorder the terms: 21 + 6 + -21x = -21x + 7 Combine like terms: 21 + 6 = 27 27 + -21x = -21x + 7 Reorder the terms: 27 + -21x = 7 + -21x Add '21x' to each side of the equation. 27 + -21x + 21x = 7 + -21x + 21x Combine like terms: -21x + 21x = 0 27 + 0 = 7 + -21x + 21x 27 = 7 + -21x + 21x Combine like terms: -21x + 21x = 0 27 = 7 + 0 27 = 7 Solving 27 = 7 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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