Mrs Lim bought a number of plates at an average price of $6. She decided to buy another plate which cost $18. The average price

Question

3 years ago

11

of all the plates then became $8. What was the total number of plates Mrs Lim bought in all?

1 answer:

soldi70 [24.7K] · Answer 1 · 2022-04-21T12:58:17+03:00

Answer: 6

<u>Step-by-step explanation:</u>

Let x represent the number of plates bought for $6

Let y represent the Total number of plates bought = x + 1

<em>Remember that Mrs. Lim bought another plate for $18</em>

Total cost ÷ Total plates = Average Cost

$\dfrac{6x+18}{x+1}=8\\$

6x + 18 = 8(x + 1)

6x + 18 = 8x + 8

18 = 2x + 8

10 = 2x

5 = x

y = x + 1

= 5 + 1

= 6