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Mathematics 7 Online
OpenStudy (anonymous):

Solve the compound inequality 60 < 20u < 120

OpenStudy (cwrw238):

split into 2: 20u > 60 and 20u < 120

OpenStudy (anonymous):

well devide 20 for both sides

OpenStudy (anonymous):

it will become 30<u<60

OpenStudy (cwrw238):

???

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