Question

ajutorrrrrrrrrrrrrrrrr.rezolvati in multimea Z ecuatia:a) (x-12)+(16-2x)=14 b)(x+25)-(x -12)=13

Answer 1

a)x-12+16-2x=14
  -x+4=14
  -x=10
  x=-10
$b) x+25-x+12=13 => 0x+37-13=0$ ; x-ul se anuleaza => nu exista (x+25)-(x-12) astfel incat rezultatul sa fie 13.