Question

Va rog frumos sa ma ajutați!

Answer 1

Răspuns:

7)

[(x:4+5):6+10]:9+2=25

[(x:4+5):6+10]:9=25-2

[(x:4+5):6+10]:9=23

[(x:4+5):6+10]=23x9

[(x:4+6):6+10]=207

(x:4+6):6=207-10

(x:4+6):6=197

(x:4+6)=197x6

(x:4+6)=1182

x:4=1182

x=1182x4

x=4728

8)

(x:3-1):3+5=61

(x:3-1):3=61-5

(x:3-1):3=56

(x:3-1)=56x3

(x:3-1)=168

x:3=168+1

x:3=169

x=169x3

x=507

9)