she sold 5/6 of the eggs.....so she sold : 5/6 * 144 = 720/6 = 120 eggs she gave her friends (144 - 120) = 24 eggs
(a) 12x = 120.....with x being the number of dozens of eggs x = 120/12 x = 10 <== she gave away 10 dozen eggs
(b) she sold a dozen for 4.50.... 4.50x = E .......x = the number of dozens of eggs sold and E = total earned. She sold 10 dozen...so sub in 10 for x 4.50(10) = E 45 = E <=== she earned $ 45 from the eggs she sold
