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Simplifying 100 = 4r Solving 100 = 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. 100 + -4r = 4r + -4r Combine like terms: 4r + -4r = 0 100 + -4r = 0 Add '-100' to each side of the equation. 100 + -100 + -4r = 0 + -100 Combine like terms: 100 + -100 = 0 0 + -4r = 0 + -100 -4r = 0 + -100 Combine like terms: 0 + -100 = -100 -4r = -100 Divide each side by '-4'. r = 25 Simplifying r = 25
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