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Simplifying -4(x + 4) = -16 + -4x Reorder the terms: -4(4 + x) = -16 + -4x (4 * -4 + x * -4) = -16 + -4x (-16 + -4x) = -16 + -4x Add '16' to each side of the equation. -16 + 16 + -4x = -16 + 16 + -4x Combine like terms: -16 + 16 = 0 0 + -4x = -16 + 16 + -4x -4x = -16 + 16 + -4x Combine like terms: -16 + 16 = 0 -4x = 0 + -4x -4x = -4x Add '4x' to each side of the equation. -4x + 4x = -4x + 4x Combine like terms: -4x + 4x = 0 0 = -4x + 4x Combine like terms: -4x + 4x = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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