First, make sure that all the variables are in one side. The first equation is gonna be x-y=3
Second, we are going to eliminate the y because it is much easier, but you can also eliminate the x
We have to add both equation because the y in the first equation is negative and in the second equation it’s positive.
We are left with 3x=9
Last, substitute x= 3 in one of the equations
P.O.I is (3,6)
d=18 so r=9
54* 2/3 = 36 will go to lunch