Question

Select the best possible first step to solving the system by first eliminating the x variable.

4x + 9y = 21
3x – 8y = 1
Answer
Multiply the first equation by 3 and multiply the second equation by 4.

None of the above

Multiply the first equation by –3 and multiply the second equation by –4.

Multiply the first equation by 8 and multiply the second equation by 9.

Answer 1

last one

Answer 2

that will make the "y"'s drop out if you add

Answer 3

even the first one will help drop out X.. so why not that?!?

Answer 4

It will work. Would need to subtract, might be more likely to mess up with the signs lol.
At least I might!

Answer 5

i can have the similar argument saying, multiplying by 4 and 3 is easier than 8 and 9 :D

Answer 6

Since they ask you to eliminate the x, that would be the way to go!

Answer 7

I would go for the first answer.

Answer 8

ohh lol yea.. i didn't see that part at all :D

Answer 9

In fact, that is probably the best answer to that problem, as they specifically ask to eliminate the x variable.

Answer 10

I believe satellite73 would also agree.