Let:
• b ,be the cost of a burger
,
• t, be the cost of a taco
"3 Burgers and 5 tacos for 24.75" means:

And "a burger is the price of two tacos" means:

Substituting in the first equation and solving for t, we get:

Using this in our second equation,

We get that burgers cost $4.50 and that tacos cost $2.25