a+b=3478
a= 3xy5
b = xy
3xy5+xy= 3478
3 x y 5
x y
_________
3 4 7 8
5+y=8, y=8-5=3
3+x=7, x = 7-3= 4
nr mic este: 43
3435 x 43 = 147705
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a+b=3478
a= 3xy5
b = xy
3xy5+xy= 3478
3 x y 5
x y
_________
3 4 7 8
5+y=8, y=8-5=3
3+x=7, x = 7-3= 4
nr mic este: 43
3435 x 43 = 147705