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Simplifying 770 = 3100r + 150 Reorder the terms: 770 = 150 + 3100r Solving 770 = 150 + 3100r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3100r' to each side of the equation. 770 + -3100r = 150 + 3100r + -3100r Combine like terms: 3100r + -3100r = 0 770 + -3100r = 150 + 0 770 + -3100r = 150 Add '-770' to each side of the equation. 770 + -770 + -3100r = 150 + -770 Combine like terms: 770 + -770 = 0 0 + -3100r = 150 + -770 -3100r = 150 + -770 Combine like terms: 150 + -770 = -620 -3100r = -620 Divide each side by '-3100'. r = 0.2 Simplifying r = 0.2
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