[3+4×(6×a-1)]÷47+9=10 VĂ ROG URGENT

Răspuns :

[3+4×(6×a-1)]÷47+9=10
[3+4×(6×a-1)]÷47=10-9
[3+4×(6×a-1)]÷47=1
3+4×(6×a-1)=47
4×(6×a-1)=47-3
4×(6×a-1)=44
6×a-1=44:4
6×a-1=11
6×a=11+1
6×a=12
a=12:6
a=2