а)26 * (x+427) = 15756
26x+11102 = 15756
26x=15756-11102
26x=4654
x=179
б)101 * (351 + y) = 65649
35451+101y=65649
101y=65649-35451
101y=30198
y=30198/101
в)22374 : (k - 125)=1243
1243(k-125)=22374
1243k-155375=22374
1243k=22374+155375
1243k=177749
k=143
г) 38007 : (4223 - t) = 9
(4223-t)*9= 38007
38007-9t=38007
-9t=38007-38007
-9t=0
t=0