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Simplifying 20 + 20r = 2r + -20 + 20r Reorder the terms: 20 + 20r = -20 + 2r + 20r Combine like terms: 2r + 20r = 22r 20 + 20r = -20 + 22r Solving 20 + 20r = -20 + 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. 20 + 20r + -22r = -20 + 22r + -22r Combine like terms: 20r + -22r = -2r 20 + -2r = -20 + 22r + -22r Combine like terms: 22r + -22r = 0 20 + -2r = -20 + 0 20 + -2r = -20 Add '-20' to each side of the equation. 20 + -20 + -2r = -20 + -20 Combine like terms: 20 + -20 = 0 0 + -2r = -20 + -20 -2r = -20 + -20 Combine like terms: -20 + -20 = -40 -2r = -40 Divide each side by '-2'. r = 20 Simplifying r = 20
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