https://latex.artofproblemsolving.com/3/b/8/3b8a47d5963cfb295842f5c4709599ecd000cc0a.png
x = - 1 - y and replace this in the other 3(- 1 - y)=4 - 3y <=> - 3 - 3y = 4 - 3y so -3 = 4 is false and we dont have solutions
Yes you are right There is no x and y!!!
+51 
