I am studying for a math test ,and I have a list of practice problems I can use to help me study. Can you check them please?

3x-3=_18 a= x=_5

12+4m=24 a= m=8

d-6>-4 a= d=10

you got the first one, but missed the other two.

12+4m = 24
4m = 12
m = 3

d-6 > -4
d > 2
Note that this one does not have a single answer. ANY number greater than 2 will make the sentence true. You solved the equation
d-6 = 4