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Use the substitution method to solve the system
` {(-x+y = 4),(4x-3y = -14):}`

Your answer is
`x=`  
`y=`  

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   x  x    n  |   | (   ) π DNE
   x    (   ) π DNE
( ) ( ] [ ) [ ] —∞ DNE
< > or All Real Numbers DNE
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