29x-15x+16=100
14x=100-16=84
x=84/14
x= 6
11y+32y-127=45
43y=45+127=172
y= 172/43
y= 4
15z+8z-59=102
23z= 102+59 = 161
z= 161/23
z= 7
9t+4t-286=0
13t= 286
t= 286/13
t= 22
14x+9x+88= 272
23x = 272-88 = 184
x= 184/23
x= 8
25x-16x+54 = 162
9x= 162-54 = 108
x= 108/9
x = 12