Răspuns :
[1.2+3.2*(3x+0.75)]/3=3.6
[1.2+3.2(3x+0.75)]=3.6*3
1.2+3.2(3x+0.75)=10.8
3.2(3x+0.75)=10.8-1.2
3.2(3x+0.75)=9.6
3x+0.75=9.6/3.2
3x+0.75=3
3x=3-0.75
3x=2.25
x=0.75
[1.2+3.2(3x+0.75)]=3.6*3
1.2+3.2(3x+0.75)=10.8
3.2(3x+0.75)=10.8-1.2
3.2(3x+0.75)=9.6
3x+0.75=9.6/3.2
3x+0.75=3
3x=3-0.75
3x=2.25
x=0.75