Can someone me with the last three questions !

1. what are the missing reasons in the proof 2. it's in the second picture and 3

The art class is planning to paint a mural on an outside wall. this figure is a scale drawing of the wall. width: 11 in length: 28 in unit rate: 1.5 ft per in. write the ratio of the area of the drawing to the area of the actual mural. write your answer as a unit rate. show that this unit rate is equal to the square of the unit rate 1.5 ft per in

How to write four times a number,minus 6,is equal to theee times the number+8 as an equqtion