Problema Solution
A thesaurus costs 75% the cost of a dictionary. Jerry bought two thesauri and
three dictionaries. He paid for his purchase with two twenty-dollar bills and
received four dollars in change. How much more money would he need to buy
another thesaurus?
Answer provided by our tutors
Let
x = the cost of dictionary
0.75x = the cost of thesaurus
2*0.75x + 3x = 2*20 - 4
........
click here to see the equation solved for x
........
x = $8
One thesaurus costs 0.75*8 = $6 and since he got $4 change he will need 6 - 4 = $2 more to buy another thesaurus.