[ 6099948-(756000:1000/(300-x):36)*201]:407025=12
6099948-(756000:1000/(300-x):36)*201=12*407025
6099948-(756000:1000/(300-x):36)*201=4884300
(756000:1000/(300-x):36)*201=6099948-4884300
(756000:1000/(300-x):36)*201=1215648
(756000:1000/(300-x):36=1215648:201
756000:1000/(300-x):36=6048
1000/(300-x):36=756000:6048
1000/(300-x):36=125
(300-x):36=1000:125
(300-x):36=8
300-x=8*36
300-x=288
x=300-288
x=12