If you wanted to eliminate the y variable by adding the two equations in the following system, what could be your first step?
3x + y = 6
4x − 5y = 10

Multiply the first equation by 5.

Multiply the first equation by −5.

Multiply the first equation by −4.

Add the two equations together.

Question

If you wanted to eliminate the y variable by adding the two equations in the following system, what could be your first step?
3x + y = 6
4x − 5y = 10 

 Multiply the first equation by 5. 

 Multiply the first equation by −5. 

 Multiply the first equation by −4. 

 Add the two equations together.

swissgirl · Answer

Well what happens when u multiply the first equation by 5?

anonymous · Answer

i dunno is the first one the answer

swissgirl · Answer

well just try it out multiply each term by 5
5(3x+y=6)

anonymous · Answer

15 + y=6

swissgirl · Answer

well we use distributive property and multiply every term
15x+5y=30

swissgirl · Answer

now add the 2 equation
15x+5y=30
   4x-5y=10
------------
19x +0y=40

swissgirl · Answer

as u see there is no y left. There are 0 y's meaning that we have eliminated the y

anonymous · Answer

so the answer is the first one right

swissgirl · Answer

yuppppp ditty dup

swissgirl · Answer

Awesome Job here is some dog food

anonymous · Answer

-_-