1) notam nr cu x, y,z
X= y -27
Z= x+26 = y-27+26= y-1
3y-27-1=143
3y= 171
Y=57, x =30, z=56
2) B=M+5
B=A-3, A=B+3=M+8
3M+13=109
M= 32, A=40, B=37
3) c=u-46
2u-46=128
U=87, c=41
4) II= I +25
III= I+50
I + I +50=150
I=50, II=75, III=100
5) X=y-5
X+y=90/2 =45
2y-5=45
Y=25