Marta’s math textbook weighs Four-fifths of a pound less than 4 times the weight of the book she is reading for her language arts class. If the weight of the math textbook is 2 and one-fifth pounds, which shows the correct equation and value of x, the weight of Marta’s book for language arts? 4 x + four-fifths = 2 and one-fifth; x = StartFraction 7 over 20 EndFraction of a pound 4 x minus four-fifths = 2 and one-fifth; x = three-fourths of a pound 4 x + four-fifths = 2 and one-fifth; x = three-fourths of a pound 4 x minus four-fifths = 2 and one-fifth; x = StartFraction 7 over 20 EndFraction of a pound