Question

My answer is D!!!!!!!!!
To solve this system using the addition method, you would need to multiply the first equation by what number in order for the y's to add out?

3x - y = 3
-2x + 2y = 6

3
2
6
none of the above

Answer 1

so, which number you think it is ?

Answer 2

It's a negative one, I think

-5

Answer 3

you want to cancel out 'y' by addition.
in 2nd 'y' has co-efficient = +2
what you need in 1st equation to get -2y ?

Answer 4

hello @Luis_Rivera !!!

In the first equation, you'd need 3?

Answer 5

2y +..... = 0 ?

Answer 6

hmmm...

Answer 7

not 2

Answer 8

2y + (-2y) = 0
right ?
you already have -y in 1st equation, to get -2y
you will need to multiply 1st equation by 2

Answer 9

got it ?

Answer 10

yes

Answer 11

:)

Answer 12

thank you

Answer 13

welcome ^_^