Question

aflati numerele necunoscute [(6×x+176)+129]:7=47 7×x=75-45+200:5. [54:(28-x)+42]:6=8. 21:[22-21:(28-21:x)] =1. va rugammmm mult. din suflet dau coroana care raspunde primul la toate si intelegatori plizz

Answer 1

[(6×x+176)+129]:7=47
6×x+176+129=47×7
6×x+305=329
6×x=24
x=4

7×x=75-45+200:5
7×x=30+40
7×x=70
x=10

[54:(28-x)+42]:6=8
[54:(28-x)+42]=8×6
54:(28-x)+42=48
54:(28-x)=48-42 
54:(28-x)=6
28-x=9
x=19

21:[22-21:(28-21:x)] =1
22-21:(28-21:x) =21
-21:(28-21:x) =21-22
-21:(28-21:x) =-1
21:(28-21:x) =1
28-21:x =21
-21:x =21-28
-21:x =-7
21:x =7
x=3