c*4+3217=25709 900000-7*x=857643
c*4=25709-3217 900000-857643=7*x
c*4=22492 42357=7*x
c=22492:4 x=42357:7
c=5623 x=6051
(62348-57219)*32-(303303-99039):9=5129*32 - 204264:9=164128 - 22696=141432
(100000-98291)*105-(568912-544538):7=1709*105 - 24374:7=179445-3482=175963