Question

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

Answer 1

multiply the 1st equation in in 3 and the 2nd in 7 then add

Answer 2

or subtract

Answer 3

multiply the 1st equation by 2 and 2nd equation by -3

Answer 4

that would'nt work mathematicalpro

Answer 5

Multiply the first equation by 7 and the second equation by 3.
Multiply the first equation by –2 and the second equation by 4.
Multiply the first equation by 2 and the second equation by –3.
Multiply the first equation by –3 and the second equation by –2.

Answer 6

Those are my choices

Answer 7

@raheen
-9*2=-18y
-6*-3=18y

Answer 8

3rd option