Question

Solve the system of equations. y = 3x + 1
4y = 12x + 4

Answer 1

write out your equations like this:

4y= 12x+4
y-3x=1. You see what I did? I subtracted the 3x so the variables could line up

Answer 2

4y=12x+4

Answer 3

oops sorry i messed up

Answer 4

its the same equation

Answer 5

y-3x=1
4y-12x=4

Answer 6

now variables are lined up

Answer 7

-1(y-3x=1). To cancel one of the variables out, make it a negative. In this case, I chose the y by itself, so multiply the whole equation by -1. Then you get, -y+3x=-1

Answer 8

4y-12x=4
-y+3x=-1.. Can you answer it from here?

Answer 9

...?

Answer 10

I guess that didn't do anything

Answer 11

what do i do if all the variable are not the same

Answer 12

wait i think i got it

Answer 13

quick question. Are you looking for the x or y?

Answer 14

it just says solve the system of equations

Answer 15

really?

Answer 16

welll if you get y by itself, you end up getting the equation, y=3x+1

Answer 17

I have to go now.. sorry! You can ask someone else for help!

Answer 18

can you not help anymore??

Answer 19

it is the same equation
it has infinite many solution

Answer 20

both equations are the same! the 2nd one is just the 1st eq multiplied by 4.

Answer 21

y-3x=1
4y-12x=4
1(y-3x=1)

Answer 22

this is what i have

Answer 23

I'm back. Like I said, both end up being the same exact question... y=3x+1, which means they have infinite solutions. I kinda forgot systems.. But yeah I guess that's my answer

Answer 24

And ignore what I did with all that math

Answer 25

oh ok..so no solution

Answer 26

@coolaidd there is solution just let any of the variable arbitrary let y=t then solveequation 1 for x
x=(t-1)/3
si solution is
x=t/3-1/3
y=t

it means it can have infinite many solutions whatever you want can take value of t .
i hope it is clear