4000 :80 = 50
(Х + 450)-3540=50
Х + 450= 3540+50=3590
х=3590-450=3140
х=3140
(1234+n)+2140=52741
1234+n=52741-2140=50 601
n=50601-1234=49367
4000 :80 = 50
(Х + 450)-3540=50
Х + 450= 3540+50=3590
х=3590-450=3140
х=3140
(1234+n)+2140=52741
1234+n=52741-2140=50 601
n=50601-1234=49367