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Afla numarul necunoscut:.
a) 297-8×8+a=412
b)a+(930-639-8×6)=303+7×8


Răspuns :

a) 297-8x8+a=412
a+297-64=412
a+297=412+64
a+297=476
a=476-297
a=179

b) a+(930-639-8x6)=303+7x8
a+(930-639-48)=303+56
a+243=359
a=359-243
a=116

Sper ca te am ajutat

a) 297-64+a=412
233+a=412=>a=412-233=179
b) a+(930-639-8x6)=303+7x8
a+(291-48)=303+56
a+243=358
a=358-243=115