Simultaneous Linear Equations Help [closed]

asked 2014-07-17 22:18:52 +0100

Iamastudent
1 ●1 ●2 ●2

updated 2015-01-13 21:18:27 +0100

FrédéricC

5206 ●3 ●43 ●114

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.

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

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answered 2014-07-19 00:17:00 +0100

Gregory Bard
33 ●2 ●2 ●10

updated 2014-07-19 00:17:25 +0100

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.

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Asked: 2014-07-17 22:18:52 +0100

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Simultaneous Linear Equations Help [closed] edit

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

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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