👤

a,b,c,d daca 4b9d=1000*a+5*100+c*10+1


Răspuns :

4b9d=1000 x 4+100 x b+ 10 x 9 + d
1000 x 4+100 x b + 10 x 9 +d = 1000 x a +100 x 5+ 10 x c +1
a=4
b=5
c=9
d=1