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Simplifying -1(2 + -1r) + 10r = N (2 * -1 + -1r * -1) + 10r = N (-2 + 1r) + 10r = N Combine like terms: 1r + 10r = 11r -2 + 11r = N Solving -2 + 11r = N Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + 11r = 2 + N Combine like terms: -2 + 2 = 0 0 + 11r = 2 + N 11r = 2 + N Divide each side by '11'. r = 0.1818181818 + 0.09090909091N Simplifying r = 0.1818181818 + 0.09090909091N
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