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2014-11-05T14:16:16+02:00
x-199+(197+201)=555
x-199+398=555
x=555+199-389
x=365
numarul este 365
x-199+(197+201)=555
x-199+398=555
x=555+199-389
x=365
numarul este 365
2014-11-05T14:18:17+02:00
Notam nr. cu "a"
a-199+197+201=555
a-199+197=555-201=354
a-199=354-197=157
a-199=157
a=157+199
a=356