Question

(3000-(520+x)+(352+196)) -279 = 1000

Answer 1

(3000-(520+х)+(352+196))-279 = 1000
3000-520-х+548-279 = 1000
-х = 1000-3000+520-548+279
-х = -2000+520-548+279
-х = -1480-548+279
-х = -2028+279
-х = -1749
х = 1749
Ответ : 1749.