(72-42):(20:5+1)+x=16
30:(4+1)+x=16
30:5+x=16
6+x=16
X=16-6
X=10
a=3*x=3*10=30
1+{2*[3+(4+y):5-6}*7=29
1+[2*(3+4+y):5-6]*7=29
1+[(6+8+2y):5-6]*7=29
1+[(14+2y):5-6]*7=29
[(14+2y):5-6]*7=28
(14+2y):5-6=4
(14+2y):5=10
14+2y=50
2(7+y)=50
7+y=25
Y=18
B=18*2=36
24-(56-3*z):4=16
(56-3*z):4=8
56-3*z=32
3*z=24
Z=8
C=8:2=4
(a:6*8-b:12*6):(c+2*2)
(30:6*8-36:12*6):(4+2*2)=(40-18):8=22:8