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rezolvati in multimea nr naturale , ecuatia x-1 supra 3 - 1-2x supra 2 =5 supra 6

Răspuns :

1*10=10
10*1=10
2*5=10
5*2=10
1. x-1=1 =>x=2
   y+1=10 =>y=9

2. x-1=10 => x=11
   y+1=1 => y=0
 
3.x-1=2 => x=3
  y+1=5 => y=4

4. x-1=5 => x=6
   y+1=2 => y=1