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Stage: 3 Short Challenge Level: Challenge Level:2 Challenge Level:2
See all short problems arranged by curriculum topic in the short problems collection

We define $a\oplus b = ab + a + b $. Given that $3 \oplus 5= 2 \oplus x$, what is the value of $x$?
 
 
If you liked this problem, here is an NRICH task which challenges you to use similar mathematical ideas.    
  
 

This problem is taken from the UKMT Mathematical Challenges.