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care este rezolvarea ecuatiilor
556+x-248=236
x-199+243=321
x-276-325=344


Răspuns :

556+x=236+248
556+x= 484
x=556-484=72;
x-19+243=321
x- 19=321-243
x-19=78
x=78+19=79;
x-276-325=344
x-276=344+325
x-276=669
x=669+276
A)556+(-72)-248=236
X=-72
B)