Answer:
Step-by-step explanation:

First divide 3 both side
Than move 4 to another side
Than divide by 2
Answer is 70degree because if angle 1 is 70 then angle 2 also will be the same then it means even angle 3 will be 70.
HOPE IT HELPS :)
.45 is just 45/100. divide both numbers by 5 to get 9/20.