2x=10
A 8
B 12
C 20
D 5
x-3=5
B 2
C -15
D -5/3
2x+3=5
A 4
B 1
C -1
D -4
5x-4=6
A 3
B 2/5
C -2
D 2
12=9+3x
A 1
D 7