Answer:
what we start bvy doing is we subtract 19. from 84.5 because it is extra and was not used in mkaing the six curtains so 84.5 - 19.7 = 64.8. now we are going to divide 64.8 by 6 because the curtains are all equal sooo 64.8/6=10.8 therefore the curtins are 10.8 yards each
I hope this helped :)
