1) (x+15)-8=17 2) (x-87)-27=36 3) 87-(41+y)=22

1) х + 15 - 8 = 17
х = 17 - 15 + 8 = 10
х = 10
2) x - 87 - 27 = 36
x = 36 + 27 + 87 = 150
x = 150
3) 87 - 41 - y = 22
-y = 22 - 87 + 41 = -24
 y = 24

10;  150;    24

;)

X+15=17+8
x+15=25
x=25-15
x=10

x-87=27+36
x-87=63
x=87+63
x=150
41+y=87-22
41+y=65
y=65-41
y=24