Register
Let x=number of cds and y=number of dvds use x+y=40 and 4x+6y=180 as your systemand solve each for y.
172k views
2 votes
Let x=number of cds and y=number of dvds

use x+y=40 and 4x+6y=180 as your systemand solve each for y.

Let x=number of cds and y=number of dvds use x+y=40 and 4x+6y=180 as your systemand-example-1
User Tom Carver
by
8.3k points

1 Answer

4 votes
x + y = 40.....multiply by -4
4x + 6y = 180
-------------------
-4x - 4y = -160 (result of multiplying by -4)
4x + 6y = 180
------------------add
2y = 20
y = 20/2
y = 10 <===

x = 30

User Syed Raza Mehdi
by
8.3k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.5m questions

12.2m answers

Other Questions

How do you estimate of 4 5/8 X 1/3
i have a field 60m long and 110 wide going to be paved i ordered 660000000cm cubed of cement  how thick must the cement be to cover field
Write words to match the expression. 24- ( 6+3)
A dealer sells a certain type of chair and a table for $40. He also sells the same sort of table and a desk for $83 or a chair and a desk for $77. Find the price of a chair, table, and of a desk.
The cost of 5 similar digital cameras and 3 similar video cameras is 3213. Each video camera costs 4 times as much as each digital camera. John buys a digital camera and a video camera. How much does he
Link Copied!