d)
101×[101-(101-102:x)]=202
101-(101-102:x)=202:101
101-(101-102:x)=2
101-102:x=101-2
101-102:x=99
102:x=101-99
102:x=2
x=102:2
x=51
e)
369-[(x+112):5+113]=434
[(x+112):5+113]=369-434
(x+112):5+113=-65
(x+112):5=-65-113
(x+112):5=-178
x+112=-178x5
x+112=-890
x=-890-112
x=-1002
f)
104:[(x-3x8)x2:8]=13
(x-24)*2:8=104:13
(x-24)*2=8*8
x-24=64:2
x=32+24
x=56