First of all you have to make them equal to each other. What I mean is the following
3x+20=2x+40
Then you should just solve for x
Answer: 2 and 4
Step-by-step explanation: the quick way is by dividing all the answer options
7 goes into 11 one time, which leaves you with 1 4/7.
I think C would be for number 11
A is for 12.
x/2 < - 18