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Simplifying -7 + -30r = -7 + -30r Add '7' to each side of the equation. -7 + 7 + -30r = -7 + 7 + -30r Combine like terms: -7 + 7 = 0 0 + -30r = -7 + 7 + -30r -30r = -7 + 7 + -30r Combine like terms: -7 + 7 = 0 -30r = 0 + -30r -30r = -30r Add '30r' to each side of the equation. -30r + 30r = -30r + 30r Combine like terms: -30r + 30r = 0 0 = -30r + 30r Combine like terms: -30r + 30r = 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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