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A={:[(1,2,1),(3,-1,2),(1,0,3)]:},B={:[(1...

`A={:[(1,2,1),(3,-1,2),(1,0,3)]:},B={:[(1,1,1),(-1,1,1),(2,-2,2)]:}` then find matrix X such that 2A+X=2B.

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`{:[(0,-2,0),(-8,4,-2),(2,-4,-2)]:}`
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