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Simplifying -4(3x + -7) = -12x + -28 Reorder the terms: -4(-7 + 3x) = -12x + -28 (-7 * -4 + 3x * -4) = -12x + -28 (28 + -12x) = -12x + -28 Reorder the terms: 28 + -12x = -28 + -12x Add '12x' to each side of the equation. 28 + -12x + 12x = -28 + -12x + 12x Combine like terms: -12x + 12x = 0 28 + 0 = -28 + -12x + 12x 28 = -28 + -12x + 12x Combine like terms: -12x + 12x = 0 28 = -28 + 0 28 = -28 Solving 28 = -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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