Question

Using elimination to solve the system 2x + y = 8 and x + y = 4, which of the following could be the first step?

Answer 1

2x + y = 8--------> 2x + y = 8
(x + y = 4)(-1)---> -x - y = -4
2x + (4 - x) = 8
2x + y = x + y
3x + 2y = 12
x = 4

Answer 2

I think it is 2x+ (4-x) = 8

Answer 3

i just need it checked

Answer 4

I'll give a medal!

Answer 5

wait, what are the choices? i'm confused

Answer 6

The choices are
2x + y = 8--------> 2x + y = 8
(x + y = 4)(-1)---> -x - y = -4
2x + (4 - x) = 8
2x + y = x + y
3x + 2y = 12
x = 4
I know it isn't the last one... I think It is 2x + (4 - x) = 8 I just need it checked

Answer 7

it's in order, isn't it?

Answer 8

oh idk. sorreh.

Answer 9

I think so...but IDK! I SO CONFUSED! I hate these problems

Answer 10

Its ok... Idont know either! :( HATE MATH RIGHT NOW!!

Answer 11

the first step should be (x + y = 4)(-1)---> -x - y = -4
to eliminate the y...

Answer 12

Yea, it makes since... but I dont know it they mean rewritng the question as the first step... IDK

Answer 13

i'd go with the second choice

Answer 14

but that's just me

Answer 15

Ok thanks so much! AriPotta... I will give you an award! :) thanks so much!

Answer 16

no problem :)