А - 986 = 3974
а = 3974 + 986
а = 4960
----------------------------
у + 1138 = 4000
у = 4000 - 1138
у = 2862
---------------------------
х - 2765 = 7081
х = 7081 + 2765
х = 9846
---------------------------
к + 40521 = 50521
к = 50521 - 40521
к = 10000
--------------------------
m*8=50800
m=50800/8
m=6350
--------------------------
a*4=4100
a=4100/4
a=1025
--------------------------
х*90=34200
х=34200/90
х=380
--------------------------
у*280=13936
у=13936/280
у=67