Răspuns :
50+a-[903:43:3×(138 450-138 448)]=46
50+a-(21:3×2)=46
50+a-(7×2)=46
50+a-14=46
50+a=46+14
50+a=60
a=60-50
a=10
50+a-(21:3×2)=46
50+a-(7×2)=46
50+a-14=46
50+a=46+14
50+a=60
a=60-50
a=10
50+a-[903:43:3•(138 450-138 448)]=46
50+a-(21:3•2)=46
50+a-(7•2)=46
50+a-14=46
a=46+14-50
a=10
50+a-(21:3•2)=46
50+a-(7•2)=46
50+a-14=46
a=46+14-50
a=10