Math help!
posted by Charlotte .
1.(g + 4)  3g = 1 + g
1
4
No solution
Identity
2. 5y + 2 = 1/2(10y + 4)
5
10
No solution
Identity
3. 0.5b + 4 = 2(b + 2)
0
0.5
No solution
Identity
4. 3x + 5 = 3x + 10
5/6
5/6
No solution
Identity
My answers:
1. 1
2. Identity
3. 0 ??? Not sure
4. No solution
I really need help on these I don't understand!

3. .5 b=2b
1.5b=0
b=0
all the others are correct. 
I know this is kinda late but thank you!!! That is correct I got my paper back today thanks!