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Simplifying -4(-74 + 4r) = -28 + -8r (-74 * -4 + 4r * -4) = -28 + -8r (296 + -16r) = -28 + -8r Solving 296 + -16r = -28 + -8r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '8r' to each side of the equation. 296 + -16r + 8r = -28 + -8r + 8r Combine like terms: -16r + 8r = -8r 296 + -8r = -28 + -8r + 8r Combine like terms: -8r + 8r = 0 296 + -8r = -28 + 0 296 + -8r = -28 Add '-296' to each side of the equation. 296 + -296 + -8r = -28 + -296 Combine like terms: 296 + -296 = 0 0 + -8r = -28 + -296 -8r = -28 + -296 Combine like terms: -28 + -296 = -324 -8r = -324 Divide each side by '-8'. r = 40.5 Simplifying r = 40.5
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