Question 324752
To solve this problem, you want to get x by itself.  
First, divide each side by 3:
3(X+7)=54
(3(x+7))/3 = 54/3
x+7 = 18
Now subtract 7 from each side to get x by itself:
x+7-7 = 18-7
x = 11
So your answer is x=11.
You could also solve this problem using the FOIL method and then get x by itself:
3(X+7)=54
(3x) + (3*7) = 54
3x + 21 = 54
3x = 33
x=11
Whichever way you decide to solve this, your answer is x=11.