Necesito ayuda por favor

a) Define x as # of quarters.  Then, # of nickels = x + 5.  b) Define y as # of nickels.  Then, # of quarters = y - 5.  c) # of quarters = 4, and # of nickels = 9.  d) 4 < 5, so the answer is No.  

Step-by-step explanation:

c) In units of cents, and the variable x, we have that 25x + 5(x+5) = 145, so that

25x + 5x + 25 = 145,

30x + 25 = 145,

30x = 120

x = 4 = # of quarters, and x+5 = 4+5=9 = # of nickels