Question

When I tried to solve the system
2x + y = 9
3x + 4y = 26

I ended up getting x = 1.3, I'm not sure that correct and I need help working through this problem!

Answer 1

You should be getting x=2

Answer 2

Hmm I'm gonna use the elimination method here to solve...multiply the top equation by 4 and subtract the 2 equations

8x + 4y = 36
-3x + 4y = 26
--------------
5x = 10

x = 2 is what you should be getting

Answer 3

shouldn't that be a negative 4?

Answer 4

In my equation @hereweg0 ? I think I know what your saying...that is just a subtraction sign...not a negative sign

Answer 5

8x + 4y = 36
-(3x + 4y = 26)
----------------
5x = 10

There...better to clear it up...

Answer 6

okay yeah I understand. it would make sense if there was ( )

Answer 7

Okay, I see my mistake! Thanks so much! (:

Answer 8

No problem! :)

Answer 9

you could also use substitution on this one, if you prefer

Answer 10

@texaschic101 yeah I did that the first time, but I think elimination was the easier method