Question

Use the Substitution Method to solve the following system of equations.
2x - 9y = 1
x - 4y = 1

(1, 5)

(-5, -1)

(5, 1)

(-5, 1)

Answer 1

Use algebra to rearrange one of the equations. I suggest rearranging equation number 2. and substituting for "x".

Since all you have to do is add one term.

Answer 2

Find the value of x from second equation first..

can you do that??

Answer 3

no!

Answer 4

x - 4y = 1

Here, add 4y both the sides and tell me what will you get??

Answer 5

x8=5?

Answer 6

@waterineyes

Answer 7

You cannot do like this:

1 + 4y = 5 (wrong)..

1 and 4y are unlike terms you cannot add or subtract them..

Answer 8

so I don't know what to do? @waterineyes

Answer 9

See :

\[x - 4y = 1\]

Add 4y both the sides:

\[x - 4y + 4y = 1 + 4y\]

\[x - \cancel{4y} + \cancel{4y} = 1 + 4y\]

\[x = 4y + 1\]

Now put this value of x in first equation to get y..

Answer 10

so is it B?

Answer 11

Solved or making guess??

Answer 12

Try more...

Answer 13

guess

Answer 14

@waterineyes come on! I'm begging you here

Answer 15

You gotta put in the work if you want to learn and master the material.

Answer 16

@waterineyes

Answer 17

http://www.purplemath.com/modules/systlin4.htm

Answer 18

\[2x - 9y = 1\]\[x - 4y = 1\] \[x=4y+1\]\[2(4y+1)-9y=1\]\[8y+2-9y=1\]\[-y=-1\]\[y=1\]
\[2x-9(1)=1\]\[2x=10\]\[x=5\]
\[\large (5,1)\]
grow the heck up and actually learn how to do it instead of expecting others to do it for you

Answer 19

I'm sorry? I have trouble in math and I have to take special classes to help me. A person can't learn everything buddy.

Answer 20

you can if you want to, you just choose not to

Answer 21

I just have trouble in math. I try to learn but I always seem to fail for some reason when it comes to math.

Answer 22

if i, who has only a few more years to live, can change my attitude even though i have very special needs and force myself to learn this stuff and keep up a 5.0 GPA even though i wont even live long enough to be able to use that in life, you can at least try, I'm very sure..

Answer 23

that sucks... but not everyone has a mind set like you do. Sure you can try, but you're not always going to succeed.

Answer 24

again, not with that attitude..

Answer 25

@yummydum what has happened to you??

Answer 26

i dont share :)

Answer 27

C'mon tell me buddy..

Answer 28

God wants me back early, that's all i tell :)

Answer 29

How old are you?

Answer 30

How old are you??

Answer 31

wow. we asked the same question... lol

Answer 32

What a coincidence..

Answer 33

Ha ha ha ha...

Answer 34

what! that sucks! sorry to hear that you aren't going to live that long

Answer 35

Tell me in inbox, I will not share it with any other...

Answer 36

thats a wonderful way to put it christian, wow lol

Answer 37

sorry.. I don't know how else to say it:/

Answer 38

@waterineyes its not a condition its just that i was born to only live so long :) God planned an early death for me, that is all, nothing to worry about :)

Answer 39

There must be any problem..

And please Don't blame God..

Answer 40

I will not force you, and I pray that you Live Long..

Answer 41

He's not blamming God, he's just stating that God wants him back.

Answer 42

He or she is mentioning God every time.. That sounds like Blaming..

Answer 43

oh lol sorry(: she*

Answer 44

blaming would be if i said "its God's fault"
i said "this is what God planned for me :) and I accept it"

Answer 45

I don't think she's blamming God

Answer 46

Okay Okay, Sorry...

Answer 47

Haha

Answer 48

well you guys have a good one :)

Answer 49

you too!