Problema Solution
a local electronics store will sell 7 AC adaptors and 2 rechargeable flashlights for $86 or 3 AC adaptors and 4 rechargeable flashlights for $84. What is the price of a single AC adaptors and a single rechargeable flashlight?
Answer provided by our tutors
let
a = the price of a single AC adapter
f = the price of a single rechargeable flashlight
a local electronics store will sell 7 AC adaptors and 2 rechargeable flashlights for $86
7a + 2f = 86
3 AC adaptors and 4 rechargeable flashlights for $84
3a + 4f = 84
by solving the system of equations
7a + 2f = 86
3a + 4f = 84
we find
a = $8
f = $15
click here to see the step by step solution of the system of equations
the price of a single AC adapter is $8.
the price of a single rechargeable flashlight is $15.