If 5 burgers and 4 orders of fries cost $30.76 and 8 burgers and 6 orders of fries cost $48.28, what is the cost of a burger and what is the cost of an order of fries?
5b + 4f = 3076
8b + 6f = 4828 Multiply first equation by -1.5
-7.5 b - 6f = -4614 Now add 2nd and 3rd equations.....solve for b Then sub this value
of b into one of the equations to calculate f