1) (11-3x)*3=15
11-3x=15:3
11-3x=5
-3x= -6
x=2
2) (5x+2)*5=60
5x+2=60:5
5x+2= 12
5x=10
3) (49-11x):3=9
49-11x=9*3
-11x= 27-49
-11x=-22