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Simplifying 220 = 4r Solving 220 = 4r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-4r' to each side of the equation. 220 + -4r = 4r + -4r Combine like terms: 4r + -4r = 0 220 + -4r = 0 Add '-220' to each side of the equation. 220 + -220 + -4r = 0 + -220 Combine like terms: 220 + -220 = 0 0 + -4r = 0 + -220 -4r = 0 + -220 Combine like terms: 0 + -220 = -220 -4r = -220 Divide each side by '-4'. r = 55 Simplifying r = 55
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