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Simplifying -5(4x + -4) + 7 = -20x + 27 Reorder the terms: -5(-4 + 4x) + 7 = -20x + 27 (-4 * -5 + 4x * -5) + 7 = -20x + 27 (20 + -20x) + 7 = -20x + 27 Reorder the terms: 20 + 7 + -20x = -20x + 27 Combine like terms: 20 + 7 = 27 27 + -20x = -20x + 27 Reorder the terms: 27 + -20x = 27 + -20x Add '-27' to each side of the equation. 27 + -27 + -20x = 27 + -27 + -20x Combine like terms: 27 + -27 = 0 0 + -20x = 27 + -27 + -20x -20x = 27 + -27 + -20x Combine like terms: 27 + -27 = 0 -20x = 0 + -20x -20x = -20x Add '20x' to each side of the equation. -20x + 20x = -20x + 20x Combine like terms: -20x + 20x = 0 0 = -20x + 20x Combine like terms: -20x + 20x = 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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