3-7 is -4 so it becomes -4x=4 divide both sides by 4 to get -x=-1 a lot of teachers dont like that negative x so you can also divide by -1 again to make it x=1
hope it helps
I think the answer might be B. $4,754.60 but I'm not sure. Sorry
I would say it’s about 105 degrees due to knowing it’s over 90 degrees