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