А*948-6390=429690 273996/b+15764=16151 (50-x) /7+195=40*5

А*948-6390=429690, а*948=429690+6390, а=436080/948, а=460; 273996/b+15764=16151,273996/b=16151-15764,b=273996/387,b=70850-x) /7+195=40*5, (50-x) /7+195=200, (50-x) /7=200-195,50-x=5*7, х=50-35, х=15270/у-2)*30=7*120, (270/у-2)*30=840,270/у-2=840/30,270/у=28+2, у=270/30, у=9