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Simplifying 155 = 15 + 5r Solving 155 = 15 + 5r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-5r' to each side of the equation. 155 + -5r = 15 + 5r + -5r Combine like terms: 5r + -5r = 0 155 + -5r = 15 + 0 155 + -5r = 15 Add '-155' to each side of the equation. 155 + -155 + -5r = 15 + -155 Combine like terms: 155 + -155 = 0 0 + -5r = 15 + -155 -5r = 15 + -155 Combine like terms: 15 + -155 = -140 -5r = -140 Divide each side by '-5'. r = 28 Simplifying r = 28
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