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9=
–
7+2(1+b)
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GPT-5 mini
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Solve 9 = −7 + 2(1 + b):
1. Expand: 2(1 + b) = 2 + 2b, so equation becomes 9 = −7 + 2 + 2b = −5 + 2b.
2. Add 5 to both sides: 14 = 2b.
3. Divide by 2: b = 7.
Check: −7 + 2(1+7) = −7 + 16 = 9. So b = 7.
1. Expand: 2(1 + b) = 2 + 2b, so equation becomes 9 = −7 + 2 + 2b = −5 + 2b.
2. Add 5 to both sides: 14 = 2b.
3. Divide by 2: b = 7.
Check: −7 + 2(1+7) = −7 + 16 = 9. So b = 7.
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