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Simplifying -1(1 + r) = -3 + -4r (1 * -1 + r * -1) = -3 + -4r (-1 + -1r) = -3 + -4r Solving -1 + -1r = -3 + -4r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '4r' to each side of the equation. -1 + -1r + 4r = -3 + -4r + 4r Combine like terms: -1r + 4r = 3r -1 + 3r = -3 + -4r + 4r Combine like terms: -4r + 4r = 0 -1 + 3r = -3 + 0 -1 + 3r = -3 Add '1' to each side of the equation. -1 + 1 + 3r = -3 + 1 Combine like terms: -1 + 1 = 0 0 + 3r = -3 + 1 3r = -3 + 1 Combine like terms: -3 + 1 = -2 3r = -2 Divide each side by '3'. r = -0.6666666667 Simplifying r = -0.6666666667
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