Question

aflati nr nat x pentru care 2x-1 divide nr 25

Answer 1

X=6. 26-1=25 25:25=1. sper ca te-am ajutat

Answer 2

2x-1/25⇒2x-1∈{1,5,25}
I. 2x-1=1/+1
   2x=2/÷2
   x=1

II. 2x-1=5/+1
    2x=6/÷2
     x=3

III. 2x-1=25/+1
     2x=26/÷2
      x=12
⇒x∈{1,3,12}