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Simplifying 2 + r = 2 + -7r Add '-2' to each side of the equation. 2 + -2 + r = 2 + -2 + -7r Combine like terms: 2 + -2 = 0 0 + r = 2 + -2 + -7r r = 2 + -2 + -7r Combine like terms: 2 + -2 = 0 r = 0 + -7r r = -7r Solving r = -7r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '7r' to each side of the equation. r + 7r = -7r + 7r Combine like terms: r + 7r = 8r 8r = -7r + 7r Combine like terms: -7r + 7r = 0 8r = 0 Divide each side by '8'. r = 0 Simplifying r = 0
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