(х-87)-27=36
x-87=36+27
x-87=63
х=63+87
х=150
__________
(150-87)-27=36
проверка
(150-х)-27=36
150-х=36+27
150-x=63
х=150-63
х=87
__________
(150-87)-27=36
87-(41+у)=22
41+у=87-22
41+у=65
у=65-41
у=24
___________
87-(41+24)=22
у-(41+24)=22
у-65=22
у=22+65
у=87
___________
87-(41+24)=22