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Simplifying 5 + r + 7r = 5 + 8r Combine like terms: r + 7r = 8r 5 + 8r = 5 + 8r Add '-5' to each side of the equation. 5 + -5 + 8r = 5 + -5 + 8r Combine like terms: 5 + -5 = 0 0 + 8r = 5 + -5 + 8r 8r = 5 + -5 + 8r Combine like terms: 5 + -5 = 0 8r = 0 + 8r 8r = 8r Add '-8r' to each side of the equation. 8r + -8r = 8r + -8r Combine like terms: 8r + -8r = 0 0 = 8r + -8r Combine like terms: 8r + -8r = 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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