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Simplifying -12x + 8x + -4 = -4(x + 1) Reorder the terms: -4 + -12x + 8x = -4(x + 1) Combine like terms: -12x + 8x = -4x -4 + -4x = -4(x + 1) Reorder the terms: -4 + -4x = -4(1 + x) -4 + -4x = (1 * -4 + x * -4) -4 + -4x = (-4 + -4x) Add '4' to each side of the equation. -4 + 4 + -4x = -4 + 4 + -4x Combine like terms: -4 + 4 = 0 0 + -4x = -4 + 4 + -4x -4x = -4 + 4 + -4x Combine like terms: -4 + 4 = 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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