7938-14*а=35280:300
7938-14а=117,6
7938-117,6=14а
7820,4=14а
а=7820,4:14
а=558,6
х*32-123=3013
32х=3013+123
32х=3136
х=3136:32
х=98
210с-900=12750
210с=12750+900
210с=13650
с=13650:210
с=65
4860-R*62=2442
4860-2442=R62
2418=62R
R=2418:62
R=39
91260-320*b=74620
91260-74620=320b
16640=320b
b=16640:320
b=52