Question

cate numere de forma abcd verifica egalitatea abcd-b53-7000=2000

Answer 1

1000a+100b+10c+d-100b-53-7000=2000
1000a+10c+d=2000+7053
1000a+10c+d=9053
d=3
c=5
b=0
1000a=9000
a=9          9053-53-7000=2000
alte solutii
a=9
b=1    9153-153-7000=2000
b=2    9253-253-7000=2000
b=3    9353-353-7000=2000
b=4    9453-453-7000=2000
b=5    9553-553-7000=2000
b=6    9653-653-7000=2000
b=7    9753-753-7000=2000
b=8    9853-853-7000=2000
b=9    9953-953-7000=2000