The answer is going to be: answer B.
Hope this helps =D
There would be 25 people in the line.
There are 6 people between jane and ken
k - - - - - - j
there are 18 people ahead of jane including ken
- - - - - - - - - - -k - - - - - - j
and 13 people behind ken including jane
- - - - - - - - - - -k - - - - - - j - - - - - -
if you add all of the dashes up from the row above, you will get your answer of 25 people in the line
X=number of plates
y=number of cups
4x+5y=25.25
7x+3y=25.50
Add the two equations together:
11x+8y=50.75
11x=50.75-8y
x=

Plug x into the first equation:
4x+5y=25.25
4(

) = 25.25

= 25.25

= 25.25
203-32y = 277.75
-32y=74.75
32y=-74.45
y=2.34 (rounded to nearest hundredth)
The price of a plate is $2.34
Rita's pay plus the overtime hrs, plus Tina's pay equals the total weekly wages(w)
[(11r) + 32] + 11t = w
That's one of the ways
Also, Rita's pay plus Tina's pay = weekly wages plus Rita's overtime hours pay
11r + 11t = w +32
Technically you just have to put the variables in the right places for it to make sense for the word problem
You can do the last example Good Luck!
Hope this helps :)