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Simplifying 4r + 80 = 4r + 80 Reorder the terms: 80 + 4r = 4r + 80 Reorder the terms: 80 + 4r = 80 + 4r Add '-80' to each side of the equation. 80 + -80 + 4r = 80 + -80 + 4r Combine like terms: 80 + -80 = 0 0 + 4r = 80 + -80 + 4r 4r = 80 + -80 + 4r Combine like terms: 80 + -80 = 0 4r = 0 + 4r 4r = 4r Add '-4r' to each side of the equation. 4r + -4r = 4r + -4r Combine like terms: 4r + -4r = 0 0 = 4r + -4r Combine like terms: 4r + -4r = 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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