Answer:
As GCF is
6
and LCM is
36
, and one number is
12
other number is
6
×
36
12
=
6
×
3
36
1
12
=
18
Step-by-step explanation:

The 2nd choice is appropriate.
Hey there!
First we have to

!

Now, we have to

our like terms

Once we solve all the

we get

Now, we have to

to each of your sides

Solve that part of the equation

Good luck on your assignment and enjoy your assignment
~
the answer is 10:20.
Hint for the future: be sure to write in the full problem. I only knew the answer because I had to do it myself, but people need more context if they are going to help you.