Simultaneous Linear Equations Help [closed]

asked 10 years ago

Iamastudent
1 ●1 ●2 ●2

updated 10 years ago

FrédéricC

5426 ●4 ●44 ●121

If (5,k) is a solution of the equation 2x+y-7=0, find the value of k.

There is no k in the equation. I am not understanding where k came from. Please help me understand.

Closed for the following reason question is off-topic or not relevant by slelievre
close date 2014-07-19 03:18:56.026641

add a comment

1 Answer

Sort by » oldest newest most voted

answered 10 years ago

Gregory Bard
33 ●3 ●3 ●10

updated 10 years ago

The author of this question intends for you to plug 5 in for x and k in for y. If you do this, you will obtain

2(5) + k - 7 = 0

10 + k - 7 = 0

3 + k = 0

k = -3

We can check our work by confirming that (5, -3) is a solution to 2x + y - 7 = 0.

2(5) + (-3) - 7 = 10 - 3 - 7 = 7 - 7 = 0.

link

add a comment

Question Tools

1 follower

Stats

Asked: 10 years ago

Seen: 724 times

Last updated: Jul 19 '14

Copyright Sage, 2010. Some rights reserved under creative commons license. Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.

Simultaneous Linear Equations Help [closed] savecancel

Closed for the following reason question is off-topic or not relevant by slelievre close date 2014-07-19 03:18:56.026641

1 Answer

Question Tools

Stats

Simultaneous Linear Equations Help [closed]

Closed for the following reason question is off-topic or not relevant by slelievre
close date 2014-07-19 03:18:56.026641