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