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Simplifying 4(x + -12) + -7 = 4x + -40 Reorder the terms: 4(-12 + x) + -7 = 4x + -40 (-12 * 4 + x * 4) + -7 = 4x + -40 (-48 + 4x) + -7 = 4x + -40 Reorder the terms: -48 + -7 + 4x = 4x + -40 Combine like terms: -48 + -7 = -55 -55 + 4x = 4x + -40 Reorder the terms: -55 + 4x = -40 + 4x Add '-4x' to each side of the equation. -55 + 4x + -4x = -40 + 4x + -4x Combine like terms: 4x + -4x = 0 -55 + 0 = -40 + 4x + -4x -55 = -40 + 4x + -4x Combine like terms: 4x + -4x = 0 -55 = -40 + 0 -55 = -40 Solving -55 = -40 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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