1)(х-87)-27=36
х-87-27=36
х=36+87+27
х=150
(150-87)-27=36
63-27=36
36=36
2) 87-(41+у)=22
87 - 41 - у = 22
у=87-41-22
у=24
87-(41+24)=22
87-65=22
22=22