olenapavlichen 17n+14n-145=134
31n=134+145
n=279/31
n=9

5n+9n+32=200
14n=200-32
n=168/14
n=12

(x+57)/7=12
x+57=12*7
x=84-57
x=27

(161-y)/16=9
y=9*16-161
y=-17

112/(17+x)=4
17+x=112/4
x=28-17
x=11