Answer:
A.One solution
B.infinite solution
C.No solution
D.One solution
Step-by-step explanation:
A.7y+21=5y+8 so y=-13/2
B.10+6x=10+6x x belongs to all real numbers
C.2x+5 and 2x+7 The leftside doesn't equal to the rightside
D.2x=12 x=6 One solution