2.700+y*400=170.700
400y = 170.700- 2.700
400y=168000
y= 168000 : 400
y=420
(12.300-30):k=30
12.270:k=30
k= 12.270 : 30
k= 409
у*400 = 170.700 - 2.700
у*400 = 168.000
у = 168.000 : 400
у = 420
12.270 : к = 30
к = 12.270 : 30
к = 409
2.700+y*400=170.700
400y = 170.700- 2.700
400y=168000
y= 168000 : 400
y=420
(12.300-30):k=30
12.270:k=30
k= 12.270 : 30
k= 409
2.700+y*400=170.700
у*400 = 170.700 - 2.700
у*400 = 168.000
у = 168.000 : 400
у = 420
(12.300-30):k=30
12.270 : к = 30
к = 12.270 : 30
к = 409