Question

What is a possible first step to eliminate a variable in the following system?
7x – 9y = 2
3x – 6y = –4

Answer Choices are

(A) Multiply the first equation by 2 and the second equation by –3.

(B) Multiply the first equation by 7 and the second equation by 3.

(C) Multiply the first equation by –3 and the second equation by –2.

(D) Multiply the first equation by –2 and the second equation by 4.

Answer 1

" What is a possible first step to eliminate a variable in the following system?" Any of them are valid.

Answer 2

multiply 3 in frst equation and 7 in second equation

Answer 3

A would get us -18+18 for the ys so that might be the simplest thing to do

Answer 4

a

Answer 5

but like i said, all of them are "possible" first steps; just one of them makes less work

Answer 6

can yall help me with another question?