Question

What is a possible first step to eliminate a variable in the following system?
2x - 3y = -1
3x - 4y = -3

Answer 1

a) Multiply the first equation by -3 and the second equation by 2.
b) Multiply the first equation by 3 and the second equation by -2.
c) Multiply the first equation by 4 and the second equation by 3.
d) All of the above.

Answer 2

decide which variable to eliminate.... x or y...

Answer 3

so the question should read to eliminate y, the 1st step should be

so if you are wanting to eliminate y... they need the same coefficient with opposite signs

I would multiply the first equation by 4 and the 2nd by -3 it would give

-8x - 12y = -4
-9x + 12y = 9

then add the equations to eliminate y

Answer 4

or if you wanted to eliminate x

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

or you could even have 1st equation by 3 and the 2nd by -2

so lots of choices.... and it depends on which letter you are going to eliminate 1st

Answer 5

i honestly have no clue.

Answer 6

well a and b will both eliminate x

c) is almost correct for eliminating y.... just the that it isn't -4 and 3 or 4 and -3

if its either of those then then answer will be d

otherwise a or b

Answer 7

so if you had to choose one what would it be?

Answer 8

I'd choose A