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Simplifying 3r + 5 + r = 7r + -2 + 7 + -3r Reorder the terms: 5 + 3r + r = 7r + -2 + 7 + -3r Combine like terms: 3r + r = 4r 5 + 4r = 7r + -2 + 7 + -3r Reorder the terms: 5 + 4r = -2 + 7 + 7r + -3r Combine like terms: -2 + 7 = 5 5 + 4r = 5 + 7r + -3r Combine like terms: 7r + -3r = 4r 5 + 4r = 5 + 4r Add '-5' to each side of the equation. 5 + -5 + 4r = 5 + -5 + 4r Combine like terms: 5 + -5 = 0 0 + 4r = 5 + -5 + 4r 4r = 5 + -5 + 4r Combine like terms: 5 + -5 = 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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