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Simplifying 85 = 75r + 10 Reorder the terms: 85 = 10 + 75r Solving 85 = 10 + 75r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-75r' to each side of the equation. 85 + -75r = 10 + 75r + -75r Combine like terms: 75r + -75r = 0 85 + -75r = 10 + 0 85 + -75r = 10 Add '-85' to each side of the equation. 85 + -85 + -75r = 10 + -85 Combine like terms: 85 + -85 = 0 0 + -75r = 10 + -85 -75r = 10 + -85 Combine like terms: 10 + -85 = -75 -75r = -75 Divide each side by '-75'. r = 1 Simplifying r = 1
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