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