Ответы и объяснения

2013-10-15T19:16:02+04:00
1) х-87-27=36
Х=36+27+87
Х=150
2) 87-(41+y)=22
87-41-y=22
-y=22+41-87
-y=-24
y=24
2013-10-15T19:16:17+04:00
(x-87)-27=36
х-87=27+36
x-87=65
х=87+65
x=152
(152-87)-27=36

87-(41+у)=22
41+y=87+22
41+y=109
y=109-41
у=68
87-(41+68)=22