Question

1 pe 5 ×{2 pe 5 +2 pe cinci +[3 pe 5 +1 pe 5 +(4 pe 5 - 1 intreg si 4 pe 5 ×x )]}=2 pe 5
Va rog .

Answer 1

1/5×{2/5+2/5+[3/5+1/5+(4/5-9/5)]}=2/5

5×1/5×{2/5+2/5+[3/5+1/5+(4/5-9/5)]}=5×2/5

2/5+2/5+[3/5+1/5+(4/5-9/5x)]=2

2/5+2/5+[3/5+1/5+4/5-9/5x]=2

2/5+2/5+[/3+1+4/5 -9/5x]=2

2/5+2/5+[8/5-9/5x]=2

2/5+2/5+8/5-9/5x=2

/2+2+8/5 -9/5x=2

12/5-9/5x=2

5×12/5-5×9/5x=5×2

12-9x=10

-9x=10-12

-9x=-2

x=2/9