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Simplifying -2(21x + 15) = 7(-1 + -6x) Reorder the terms: -2(15 + 21x) = 7(-1 + -6x) (15 * -2 + 21x * -2) = 7(-1 + -6x) (-30 + -42x) = 7(-1 + -6x) -30 + -42x = (-1 * 7 + -6x * 7) -30 + -42x = (-7 + -42x) Add '42x' to each side of the equation. -30 + -42x + 42x = -7 + -42x + 42x Combine like terms: -42x + 42x = 0 -30 + 0 = -7 + -42x + 42x -30 = -7 + -42x + 42x Combine like terms: -42x + 42x = 0 -30 = -7 + 0 -30 = -7 Solving -30 = -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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