Răspuns :
.....:4=3-1=2
......2×4=8
.......8+1=9
........9:3=3
........3-2=1
...........5×1=5
a=5+3=8
......2×4=8
.......8+1=9
........9:3=3
........3-2=1
...........5×1=5
a=5+3=8
{3x[2+5:(a-3)]-1}:4=3-1=2
3x[2+5:(a-3)]-1=4x2=8
3x[2+5:(a-3)]= 8+1=9
2+5:(a-3)=9:3= 3
5:(a-3)= 3-2=1
a-3= 5:1= 5
a= 5-3= 2
3x[2+5:(a-3)]-1=4x2=8
3x[2+5:(a-3)]= 8+1=9
2+5:(a-3)=9:3= 3
5:(a-3)= 3-2=1
a-3= 5:1= 5
a= 5-3= 2