Question

-3x+2y>5y+9

Answer 1

So whats the question regarding this inequality?

Answer 2

I am lost when it comes to this and have been trying to figure out how to solve this

Answer 3

This inequality has two variables and so, it is unsolvable if the two variables are unknown? Do you need to find x or y?

Answer 4

it wanted to know which is equivalent and they gave me 4 answers but i dont know how to solve it to get the answer

Answer 5

-3x +2y > 5y + 9
-3x > 5y (-2y) + 9
-3x > 3y + 9
multiply across by -1 change sign
3x < -3y + 9
divide by 3
x < -y + 3

Answer 6

Does that answer fit any of the four answers they gave you?

Answer 7

no but let me see what you did so i can try and figure it out

Answer 8

so do i divide by 3 for all?

Answer 9

answer is actually x > -y-3 sorry

Answer 10

see i got y>x+3

Answer 11

none of the answers but mine were one of the options

Answer 12

it cant be thats not one of my options

Answer 13

well maybe if i solved for y then it would be -x-3>y

Answer 14

Okay, step by step, here we go:
step 1: subtract 2y from both sides
-3x +2y (-2y) > 5y (-2y) + 9

Answer 15

did that

Answer 16

gives: -3x > 3y + 9

Answer 17

ok

Answer 18

step 2: multiply across by -1 to get rid of minus sign
-1 (-3x ) > -1(3y + 9) => 3x > -3y -9

Answer 19

but why multiply by -1 thats where you lost me

Answer 20

now need to reverse sign when you multiply by a negative number so it becomes:
3x < -3y -9

Answer 21

I multiplied by -1 becuase I have -3x but I want x to be positive

Answer 22

ok that makes sense

Answer 23

ok

Answer 24

so final step is divide both sides of 3x < -3y -9 by 3 to get
x < -y -3

Answer 25

Then take a bow!LOL

Answer 26

i did that but here are my answers:
A: y>x+3
B;Y>-x-3
C. y<x-3
D. y<-x-3

Answer 27

so B?

Answer 28

okay we will get there

Answer 29

i hope so i have been at this for 4 hours!

Answer 30

LOL

Answer 31

i do nt see a -y anywhere?

Answer 32

so all answers are in terms of y, so we need to find answer in terms of y

Answer 33

ok

Answer 34

so lets add 3 to both sides of our answer to cancel -3 as follows:
x (+ 3) < -y -3 (+3)

Answer 35

ok give me one sec im doing it

Answer 36

now we have x+3 < -y so to get ri of y we multiply across by -1:
-1(x + 3) < -1(- y)
-x -3 > y dont forget sign changes if you multiply by negative number

Answer 37

is this it 2y>5y+9+3x

Answer 38

now we can rewrite this with y on left hand sign but we also need to change sign
y < -x -3

Answer 39

thank you so much for your help

Answer 40

youre welcome!