Hi again Travina;
12x 7 = 29
Let's add 7 to both sides...
12x  7 + 7=29 +7
Let's add the numbers together...
12x+0=36
12x + 0 = 36
We do not need the zero...
12x = 36
Let's divide both sides by 12...
12x/12 = 36 /12
Let's note that 12/12=1
Let's note that 36/12=3
1x=3
Let's note that 1x=x
x=3
No further attention is required.
1/12/2014

Vivian L.