Question

An online store sells two types of speaker docks for smartphones. the higher-priced speaker dock sells for $190 and the lower-priced speaker dock sells for $70. last week the store sold four times as many lower-priced speaker docks as higher-priced speaker docks. combined sales totaled $4,230. how many lower-priced speaker docks did it sell?

Answer 1

Answer: Lower priced speaker dock sold total $2,880.

Solution: 190x + 80(4x) = 4590 ......(1)

Where, x represents how many are sold.

Solving eq(1) and finding the value of x

190x + 320x = 4590

510x = 4590

x = 4590/510 = 9

So, 9 is the Higher priced speaker dock then 4x = 4×9 = 36 is the Lower priced speaker dock.

Hence, 36 lower-priced speaker docks did it sold.

Then total amount of Lower priced speaker dock sold :

1 Lower priced speaker dock sold = $80

Then,

36 Lower priced speaker dock sold = 36×80 = $2,880