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Simplifying 21r + 13 = -83 + 22r Reorder the terms: 13 + 21r = -83 + 22r Solving 13 + 21r = -83 + 22r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-22r' to each side of the equation. 13 + 21r + -22r = -83 + 22r + -22r Combine like terms: 21r + -22r = -1r 13 + -1r = -83 + 22r + -22r Combine like terms: 22r + -22r = 0 13 + -1r = -83 + 0 13 + -1r = -83 Add '-13' to each side of the equation. 13 + -13 + -1r = -83 + -13 Combine like terms: 13 + -13 = 0 0 + -1r = -83 + -13 -1r = -83 + -13 Combine like terms: -83 + -13 = -96 -1r = -96 Divide each side by '-1'. r = 96 Simplifying r = 96
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