five hamburgers and one order of fries together cost $10.24, where as one hamburger and five orders of fries together cost $5.84.what is the total cost of three

Question

I don't know how to do this

Answer 1

5h + f = 10.24

h + 5f = 5.84

 

We can either solve the first equation for f or solve the 2nd for h, then substitute.

 

f = 10.24 - 5h

 

h + 5(10.24 - 5h) = 5.84

h + 51.2 - 25h = 5.84

24h = 45.36

h = 1.89

 

f = 10.24 - 5(1.89)

f = 10.24 - 9.45

f = 0.79

 

One hamburger is $1.89 and one order of fries is 79 cents. The rest of the problem, which is left off, is up to you.