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10r+9(4r–17)=
–
15
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GPT-5 mini
AI
10r + 9(4r − 17) = −15
Expand: 10r + 36r − 153 = −15
Combine like terms: 46r − 153 = −15
Add 153: 46r = 138
Divide: r = 138/46 = 3
Check: 10(3) + 9(12 − 17) = 30 + 9(−5) = 30 − 45 = −15 ✓
Answer: r = 3
Expand: 10r + 36r − 153 = −15
Combine like terms: 46r − 153 = −15
Add 153: 46r = 138
Divide: r = 138/46 = 3
Check: 10(3) + 9(12 − 17) = 30 + 9(−5) = 30 − 45 = −15 ✓
Answer: r = 3
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