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Let Jon received 2x(smaller amount)
      Jack received = 4x

2x = 1256
⇒x = 628
Thus 4x = 628X4 = 2512

So jack received $2512.
2 2 2
 mr.jeff has amount =y
share between jon and jack is in yhe ratio 4:2
mr.jeff has amount =>4x+2x=y
jon share =>1256=2x
jack share =>4x=4*628
therefore jack got share=2512
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