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calculeaza.2000-a×7-(a×2+712)=. unde a=108 si a = dublu numarul 49.

Răspuns :

2000-7a-2a-712=1288-9a
a=108⇒1288-9*108=1288-972=316
a=2*49=98⇒1288-9*98=1288-882=406
a=49×2
a=98
2000-108×7-(98×2+712)=
2000-756-(196+712)=
1244-908=336