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Simplifying -7(3x + -6) = -21x + -42 Reorder the terms: -7(-6 + 3x) = -21x + -42 (-6 * -7 + 3x * -7) = -21x + -42 (42 + -21x) = -21x + -42 Reorder the terms: 42 + -21x = -42 + -21x Add '21x' to each side of the equation. 42 + -21x + 21x = -42 + -21x + 21x Combine like terms: -21x + 21x = 0 42 + 0 = -42 + -21x + 21x 42 = -42 + -21x + 21x Combine like terms: -21x + 21x = 0 42 = -42 + 0 42 = -42 Solving 42 = -42 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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