Hi there!

First we need to work out the parenthesis, which can for instance be done using rainbow technique.

Now subtract 3 from both sides.

And finally add 3x to both sides.

The 4th answer choice is correct.
18 1/2 -17 3/4
= 18.50 -17.75
= 0.75
= 3/4
The 4th selection is appropriate.
Answer:I think it is a
Step-by-step explanation:
6 plus 6 is 12 then 12 plus 3 is 15 then 15 plus 3 and 3 is 21 then we do 21 plus 4.2 is 25.4 plus 3 is 28.4 hope this helps