# math

posted by
**john**
.

a=7-3a. for example 2=7-3(2)=1. if 6-x=2-x, find the value of x. the problem i am having is that the first a is in a square box and the first 2 is in a squre box. so does 6 and -x in a square box. I am not sure what the boxes represent?