a*b=305.25
(a+2.5)*b=397.75
a=305.25/b
(305.25/b+2.5)*b=397.75
(305.25/b*b)+2.5b=397.75
2.5b=397.75-305.25
2.5b=92.5
b=92.5/2.5
b=37
a*37=305.25
a=8.25
у- второй множитель
х*у=305.25
х=(х+0.5)*у=ху+0.5у=323.75
*y+0.5y=323.75
305.25+0.5y=323.75
0.5y=323.75-305.25
0.5у=18.5
у=18.5:0.5
у+37
х=305.25:37=8,25
a*b=305.25
(a+2.5)*b=397.75
a=305.25/b
(305.25/b+2.5)*b=397.75
(305.25/b*b)+2.5b=397.75
2.5b=397.75-305.25
2.5b=92.5
b=92.5/2.5
b=37
a*37=305.25
a=8.25