Let the hours when they equalize=h, then we have:
12.25 + .13h=13 - .09h
.13h + .09h=13 - 12.25
.22h=.75 divide both sides by .22
h=.75/.22
h=3 9/22, hours, when they will equalize.
3/5 = 6/10 = 6×(1/10)
The piece will be divided into <em>6 sections</em> of 1/10 yard each.
A represents the lower number in the group.