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Simplifying 714 + 38r = 21r Solving 714 + 38r = 21r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-21r' to each side of the equation. 714 + 38r + -21r = 21r + -21r Combine like terms: 38r + -21r = 17r 714 + 17r = 21r + -21r Combine like terms: 21r + -21r = 0 714 + 17r = 0 Add '-714' to each side of the equation. 714 + -714 + 17r = 0 + -714 Combine like terms: 714 + -714 = 0 0 + 17r = 0 + -714 17r = 0 + -714 Combine like terms: 0 + -714 = -714 17r = -714 Divide each side by '17'. r = -42 Simplifying r = -42
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