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Simplifying -8(r + -3) = 28 + -4r Reorder the terms: -8(-3 + r) = 28 + -4r (-3 * -8 + r * -8) = 28 + -4r (24 + -8r) = 28 + -4r Solving 24 + -8r = 28 + -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. 24 + -8r + 4r = 28 + -4r + 4r Combine like terms: -8r + 4r = -4r 24 + -4r = 28 + -4r + 4r Combine like terms: -4r + 4r = 0 24 + -4r = 28 + 0 24 + -4r = 28 Add '-24' to each side of the equation. 24 + -24 + -4r = 28 + -24 Combine like terms: 24 + -24 = 0 0 + -4r = 28 + -24 -4r = 28 + -24 Combine like terms: 28 + -24 = 4 -4r = 4 Divide each side by '-4'. r = -1 Simplifying r = -1
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