You need to spend exactly $20 to buy eggs at $1 per carton of a dozen eggs and cheese at $2 per block containing eight ounces of cheese to make omelettes There must be exactly twice as many eggs as ounces of cheese in the
omelettes. How many cartons of eggs and blocks of cheese should you buy?
Next think about what equation represents the fact that there must be twice as many eggs as ounces of cheese in
the omelette. Let
x=the number of cartons of eggs (with 12 eggs in each carton) and
y=the number of blocks of cheese (with 8 ounces of cheese in each block).