Solving Equations with Brackets

Question 1:

6x+9=84
x =5

Question 2:

3x6=15
x =11

Question 3:

10x10=0
x =10

Question 4:

5x+5=55
x =6

Question 5:

11x5=55
x =10

Question 6:

10x+8=140
x =6