First you need to combine like terms
7-3x= 5x+13
step 1 add 3x
7=8x+13
step 2 subteact 13
-6=8x
step 3 divide both sides by two
x=-3/4
Let , coordinate of points are P( h,k ).
Also , k = 3h + 1
Distance of P from origin :

Distance of P from ( -3, 4 ) :

Now , these distance are equal :

Solving above equation , we get :

Hence , this is the required solution.
You must connect all the letters to create the shape of a trapezoid
Y = 6
5y = 5 x y
5y = 5 x 6
5y = 30.
It is C. 30.
Hope This Helps You!
Good Luck Studying :)