Question

Study session.... emergency! please help??

What is a possible first step in eliminating a variable in the following system of equations?x + 7y = -15

2x + 7y = -9
Answer

Multiply the first equation by -1.

Multiply the second equation by -1

Multiply the first equation by -2.

All of the above

Answer 1

(I think it's C...)

Answer 2

All of them..

Answer 3

@Kashan Thank you...........!!!!!

Answer 4

all of them

Answer 5

@InsanelyChaotic no problem... :)

Answer 6

A) x+7-7y=-15 first subtract 7 from both side. then it will become
x-7y=-22
- 2x+7y=-9 the -7y and +7y are gone. so
=-x=-13
x=13
B) x+7-7y=-15 add 7 to both sides. = x-7y=-22
(-) x-7y=-22
= -31

13, -31 i think thats is the answer.

I HOPE ITS HELPFUL! :D