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