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what is a variable that u can eliminate?

X? I think. I'm completely lost

treat this as an equation

You can add or subtract to eliminate a letter (x or y).

\[\frac{ y=8x-9 } { y=4x-1 }\]

so can you see any thing that can be eliminated by subtraction or addition?

hello??

9-1??? Sorry I didn't reply I got sidetracked

do u know wit a variable is?

I'm sorry I really need help I suck at math pls

For part A. substitution is a better choice.

u can eliminate y

so it becomes \[\frac{ 8x-9 }{ 4x-1 }\]

and how the heck can you solve with that?

Fine I don't want your help. You didn't hack me shut up.

-_- ughhhh @ganeshie8

@Icedragon50 stop creating drama on here. Just leave if you can't help nicely to other OS users.

Thank you @usukidoll for actually helping me

\[8x-y=9\]\[4x-y=1\]

looking it this way might help

-1+9=8 thanks so much

forgot one part though
8x-4x=-1+9
now what's 8x-4x and what's -1+9 ?
what's 8x-4x ?

yea its easier to put in matrix form that way :)

true, but most of the time , matrix form versions are taught way later o_O.

@andrea0529 what's 8x-4x ?
or an easier way to put it by factoring the x
x(8-4) what's 8-4 ?

4x

yea, once you go matrix you dont go back!

:)
so now we have 4x = 8
we divide 4 from both sides
so what's 8/4 ?

8 divided by 4 @andrea0529
then we have x by itself after that step.

|dw:1438679720781:dw|

8/4=2 so x=2

8-1=7

7=4(2)-1
7=8-1
7=7
7=8(2)-9
7=16-9
7=7

so we have done this correctly. Apparently at the point (2,7) the two lines should intersect

yeah what this guy wrote ^

because graphing manually is a pain. I think I overshot part b. oh well .

@andrea0529 overshot part b. it was just asking the point of intersection with is (2,7) .

Okay I get it know I mostly needed help with part a. I've got part b. Thank you so much.☺️