1) х=313
2)у=628
3)а=27876
4)b=926
(X-111)*59=11918
X-111=11918:59
X-11=202
X=202 11
X=213
975(y-615)=12675
Y-615=12675:975
Y-615=13
Y=615 13
Y=628
(30901-a):605=51
30901-a=605*51
30901-a=30855
A=30901-30855
A=46
39765:(b-893)=1205
B-893=39765:1205
B-893=33
B=893 33
B=926