Question

5u+2v=-16, 3u+v=-7 solve by elimination

Answer 1

which variable do you want to get rid of first:

5u+2v=-16
3u+v=-7

Answer 2

u

Answer 3

why the v seems easier

Answer 4

ok then

Answer 5

how

Answer 6

so to get rid of the v well multiply that equation by -2

5u+2v=-16
(-2)[3u+v]=-7(-2)
+__________________

Answer 7

2*3

Answer 8

ya so your problem will look like this now

5u+2v=-16
-6u-2v=14
+__________________

Answer 9

ok what is next

Answer 10

add them up

Answer 11

11u,4v

Answer 12

5u+(-6u)=-u

Answer 13

-2v+2v=what

Answer 14

4v

Answer 15

-2v+2v=0

Answer 16

now whats -16+14

Answer 17

30

Answer 18

why are you not including the negative in your adding

Answer 19

sorry 28

Answer 20

whats 14-16

Answer 21

-2

Answer 22

correct so what -16+14

Answer 23

-4

Answer 24

how are you getting that

Answer 25

-6

Answer 26

adding -16+14

Answer 27

you said 14-16=-2
so isnt -16+14 the same thing

Answer 28

am I subtracting or adding

Answer 29

what i wrote is the same thing i just switched places, its the same problem

Answer 30

ok got it is = to 2

Answer 31

-2

Answer 32

now what do we do

Answer 33

alryte so we have:

-u=-2

we want the u to be positive so well divide both sides by negative 1 since
-u is the same thing as (-1)u

so -u/-1=-2/-1

Answer 34

ok whats next

Answer 35

what did u get

Answer 36

-u/-1=-2/-1

Answer 37

ya thats the problem what was the result tho