1/3(9x+27)-4=1/2(2x+54)

First you need to distribute to everything in the parentheses.
3x+9-4=1x+27
Combine like terms
3x+5=x+27
isolate variable
3x+5=x+27
-x        -x
2x+5=27 
Whatever you do to one side do to the other so I subtract x from both sides. then you must subtract 5 from both sides

2x+5=27
-5     -5
2x=22
divide by 2
2x=22
/2   /2
x=11
Hope that helped

Idon’t know the answer to this