Question

What is a possible first step in eliminating a variable in the following system of equations?

x + 7y = –15
2x + 7y = –9

Multiply the first equation by –1.

Multiply the second equation by –1

Multiply the first equation by –2.

All of the above

Answer 1

IF you multiphe first equation by -2, you will be able to eliminate x

Answer 2

If you multiply the first or second equation times -1, you will be able to eliminate y.

Answer 3

So what do you think ?

Answer 4

So it will be D because all of it eliminate..

Answer 5

Yes, correct !

Answer 6

Thanks!

Answer 7

np