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Simplifying -45 + 3r = 8r Solving -45 + 3r = 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. -45 + 3r + -8r = 8r + -8r Combine like terms: 3r + -8r = -5r -45 + -5r = 8r + -8r Combine like terms: 8r + -8r = 0 -45 + -5r = 0 Add '45' to each side of the equation. -45 + 45 + -5r = 0 + 45 Combine like terms: -45 + 45 = 0 0 + -5r = 0 + 45 -5r = 0 + 45 Combine like terms: 0 + 45 = 45 -5r = 45 Divide each side by '-5'. r = -9 Simplifying r = -9
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