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

x + y = 3
3x – 4y = 23

Question

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

x + y = 3
3x – 4y = 23

anonymous · Answer

By substituting x = 3-y in second equation.

lalaly · Answer

no multiply the first equation by -3

anonymous · Answer

answers are
(A) None of the above.
(B) Multiply the first equation by –4.
(C) Choices 1 and 2.
(D) Multiply the first equation by 3.

anonymous · Answer

B & D

anonymous · Answer

which 1 first?

anonymous · Answer

(D) Multiply the first equation by 3.

(B) Multiply the first equation by –4.


Both

anonymous · Answer

i cant pick both

amistre64 · Answer

you cant pick any good answer becasue its a lousy question.

anonymous · Answer

if u go with its more apt as u dnt need 2 change signs lyk in the case of the option d

amistre64 · Answer

id go none of the above :)

amistre64 · Answer

multiply the top by 4 or -3 will give he simplest results for elimination; so  none of the options fit "good" enough

anonymous · Answer

are you sure about the options ? are they in the right order ?

anonymous · Answer

b is the correct option

anonymous · Answer

@Aditi yes