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If |{:(4,5),(m,3):}|=22 , then find the ...

If `|{:(4,5),(m,3):}|=22` , then find the value of `m`.

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`|{:(4,5),(m,3):}|=22`
`{:( :. 4xx3-5xxm=22, :. 12-5m=22):}`
`{:( :.-5m=22-12, :.-5m=10, :. m=(10)/(-5)):}`
`:.m=-2`
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