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