The first side of a triangle is 8 meters longer than twice the second side. the third side is 3 times the second side. the perimeter is 128 meters. find the lengths of the three sides. (show work)

As a self-employed seamstress, you know that it takes 7 yards of material to make 3 jackets. you bought 15 yards of material to make 7 jackets. did you buy enough material? if not, how much were you over or under?