What I meant was, which ones do you need and could you take a picture in better lighting? I can't see it all the way.
2x-7y=18 _(1)
-2x+4y=5
11y=23 , Y=23/11 sub in 1
2x-7×23/11=18
2x = 18×11 + 7×23
x = ( 198 + 161 )/2 = 359/2
D(-1,-1), E(-8,-4), F(-8,-8)
His commission rate would be 4%
480/12000=.04
