Question

Find the y-coordinate for the solution of the system of linear equations.

5x - 3y = -11

-7x - y = 5

Answer 1

Ok the easiest way for me to solve this would be to multiply the bottom equation by -3 and then add the equations

Answer 2

5x-3y=-11 -> 5x-3y=-11
-7x-y=5 times -3-> 21x+3y=-15
--------------- add
26x+0=-26
26x=-26

Answer 3

Does that look as pretty as it does to me on my screen?

Answer 4

Yes it does

Answer 5

Great so what is x?

Answer 6

26

Answer 7

Try again
We have 26x=-26

Answer 8

-26 lol

Answer 9

26x = -26
-- --- Divided both sides by 26
26 26

Answer 10

26/26=1 and -26/26=-1
so we have

26x = -26
-- ----
26 26



=>



1x = -1



=>

x = -1

Answer 11

oh ok i got it now thanx

Answer 12

But we want to know what y is...
So take this -1 and go to one of the equations that were given to you
and replace x with -1 and solve for y
and then you will be done :)

Answer 13

great patience and explanation work @myininaya. you inspire!!

Answer 14

so the answer would be 1

Answer 15

So this is one of the equations given to you:
5x - 3y = -11
and we found x to be -1
So replacing x with -1 gives me
5(-1)-3y=-11
-5-3y=-11
Can you solve this for y?

Answer 16

no i cant

Answer 17

-5 - 3y = -11

To solve for y (or to isolate y) some possible steps to take are:

To first add 5 on both sides


-5 - 3y = -11
+5 +5

---------------------

0 - 3y = -6

-3y = -6

Can you solve this equation for y?
I know you can do it :)
Try.

Answer 18

it would be 2