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Simplifying -4 + 7(x + -3) = 12x + 4 + -5x Reorder the terms: -4 + 7(-3 + x) = 12x + 4 + -5x -4 + (-3 * 7 + x * 7) = 12x + 4 + -5x -4 + (-21 + 7x) = 12x + 4 + -5x Combine like terms: -4 + -21 = -25 -25 + 7x = 12x + 4 + -5x Reorder the terms: -25 + 7x = 4 + 12x + -5x Combine like terms: 12x + -5x = 7x -25 + 7x = 4 + 7x Add '-7x' to each side of the equation. -25 + 7x + -7x = 4 + 7x + -7x Combine like terms: 7x + -7x = 0 -25 + 0 = 4 + 7x + -7x -25 = 4 + 7x + -7x Combine like terms: 7x + -7x = 0 -25 = 4 + 0 -25 = 4 Solving -25 = 4 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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