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Simplifying -1(5 + -1r) = 1 + 2r (5 * -1 + -1r * -1) = 1 + 2r (-5 + 1r) = 1 + 2r Solving -5 + 1r = 1 + 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. -5 + 1r + -2r = 1 + 2r + -2r Combine like terms: 1r + -2r = -1r -5 + -1r = 1 + 2r + -2r Combine like terms: 2r + -2r = 0 -5 + -1r = 1 + 0 -5 + -1r = 1 Add '5' to each side of the equation. -5 + 5 + -1r = 1 + 5 Combine like terms: -5 + 5 = 0 0 + -1r = 1 + 5 -1r = 1 + 5 Combine like terms: 1 + 5 = 6 -1r = 6 Divide each side by '-1'. r = -6 Simplifying r = -6
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