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If [[(x,y)],[(x,x/2+x)]]+[[(y,x+t)],[(x/...

If `[[(x,y)],[(x,x/2+x)]]+[[(y,x+t)],[(x/2,x/2)]]=[[(1,4)],[(2,2)]]` then find the values of x,y,z and t.

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