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Simplifying 80 = 3 + 77r Solving 80 = 3 + 77r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-77r' to each side of the equation. 80 + -77r = 3 + 77r + -77r Combine like terms: 77r + -77r = 0 80 + -77r = 3 + 0 80 + -77r = 3 Add '-80' to each side of the equation. 80 + -80 + -77r = 3 + -80 Combine like terms: 80 + -80 = 0 0 + -77r = 3 + -80 -77r = 3 + -80 Combine like terms: 3 + -80 = -77 -77r = -77 Divide each side by '-77'. r = 1 Simplifying r = 1
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