1)(223440-130*х):35=6020 2)(31*540-х)*120=10200

1)223440-130*x=35*6020 223440-130x=210700 -130x=-12740 x=12740:130 x=98 2)(31*540-x)=10200:120 31*540-x=85 16740-x=85 x=16740-85 x=16655