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Simplifying r = 3 + (2) * 561 + -2r Multiply 2 * 561 r = 3 + 1122 + -2r Combine like terms: 3 + 1122 = 1125 r = 1125 + -2r Solving r = 1125 + -2r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '2r' to each side of the equation. r + 2r = 1125 + -2r + 2r Combine like terms: r + 2r = 3r 3r = 1125 + -2r + 2r Combine like terms: -2r + 2r = 0 3r = 1125 + 0 3r = 1125 Divide each side by '3'. r = 375 Simplifying r = 375
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