Question

Can you show the work of how to work this word problem ? A local electronics store will sell 7 ax adapters and 2 rechargeable flashlights for $86 or 3 ac adapters and 4 rechargeable flashlights for $84. What is the price of a single ax adapter and a single rechargeable flashlight ?

Answer 1

7 a + 2 f = 86

3 a + 4 f = 84

14 a + 4 f = 172
3 a + 4 f = 84
------------------subtract
11 a = 88

a = 8
then
7(8) + 2 f = 86
so
f = 15