Help please, need someone to double check my work

Question

81-4x=29

 

Just checking that to see if my work is correct:

 

81-4(x)=29

81-4(13)=29

81-52=29

x=13

Answer 1

YOU can do the checking--that's the whole point of the concept of checking.

 

If 13 is the value of x, you substitute it and calculate; if you get a true statement, then it's checked.