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cate alune am avut daca am mancat 2100, apoi am adunat inca 1457 si acum am 3678?


Răspuns :

acum ai 3678 de alune
3678-1457=2221
2221+2100=4321 ai avut
R.  4321-2100=2221
2221+1457=3678
(a-2100)+1457=3678
(a-2100)=3678-1457
a-2100=2221
a=2221+2100
a=4321

4321-2100+1457=3678