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