Please help me???? my answer is C

If you were to use the elimination method to solve the following system, choose the new system of equations that would result after the variable y is eliminated in the first and second equations, then the second and third equations.
3x - y + 3z = 1
4x + y - 6z = 3
4x - 2y + 3z = -3 (4 points)
Answer

7x - 3z = 4
12x - 9z = 3

7x - 3z = 4
4x - 6z = 3

3x + 3z = 1
12x - 9z = 3

3x + 3z = 1
4x - 6z = 3

Question

Please help me???? my answer is C

If you were to use the elimination method to solve the following system, choose the new system of equations that would result after the variable y is eliminated in the first and second equations, then the second and third equations.
3x - y + 3z = 1
4x + y - 6z = 3
4x - 2y + 3z = -3 (4 points)
Answer
		
7x - 3z = 4
12x - 9z = 3
		
7x - 3z = 4
4x - 6z = 3
		
3x + 3z = 1
12x - 9z = 3
		
3x + 3z = 1
4x - 6z = 3

hartnn · Answer

how u got C ??

anonymous · Answer

I took the recirpcal into consideration

anonymous · Answer

so in the problem its 3x-y.. and i did the opposite

hartnn · Answer

u add 1st 2 equations, what u get ?

anonymous · Answer

7

anonymous · Answer

Is the answer "A"?

hartnn · Answer

what 7 ?
when u add equations, u get an equation

hartnn · Answer

did u get it as A ? i don't like guesses...

anonymous · Answer

It's not a guess whatsoever. Final answer.

anonymous · Answer

I used the information you gave me and applied.

hartnn · Answer

if its not a guess, then A is correct :)