I don't know what you are talking about please re word the question its really hard to understand what your asking.
What you would have to do is take the 18 and double it because 50% doubled is 100% so when you double 18 it is 36
-1 / 7 = x
You need to combine the 2x and 5x then devise the 7x from -1
7 + b
= 7 + 15
= <u>22</u>
<u>hope</u><u> </u><u>it</u><u> </u><u>helps</u><u>!</u>
