1.X - 3=0
A.4
B.2
C.0
D.3
E.1
2.X - 15=20
A.35
B.45
C.15
D.10
E.5
3.X - 10=90
A.90
B.100
C.110
D.70
E.80
5.X + 7 =20
A.15
B.20
C.13
D.7
E.14