Question

Tanya bought 3 items that each cost same amount. Tony bought 4 items that each cost the same amount, but each was $2.25 less than the items that Tanya bought. Both Tanya and Tony paid the same amount of money. What was the individual cost of each person's items?

Answer 1

take tanya's items as x and tony's items as y,
3x = 4y

x = y + 2.25 ------(1)
3y + 6.75 = 4y

6.75 = y

substitute 6.75 into (1),

x = 6.75 + 2.25

x = 9