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Simplifying 42 = 3r + 17 Reorder the terms: 42 = 17 + 3r Solving 42 = 17 + 3r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3r' to each side of the equation. 42 + -3r = 17 + 3r + -3r Combine like terms: 3r + -3r = 0 42 + -3r = 17 + 0 42 + -3r = 17 Add '-42' to each side of the equation. 42 + -42 + -3r = 17 + -42 Combine like terms: 42 + -42 = 0 0 + -3r = 17 + -42 -3r = 17 + -42 Combine like terms: 17 + -42 = -25 -3r = -25 Divide each side by '-3'. r = 8.333333333 Simplifying r = 8.333333333
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