FAN, FAN TESTIMONIAL, AND MEDAL!!!
Choose the equivalent system of linear equations that will produce the same solution as the one given below.

6x + 2y = -6
3x - 4y = -18

A) 12x + 4y = -12
15x = -30
B) 8x + 4y = -4
14x = -10
C) 6x - 8y = -36
-6y = -42
D) 6x - y = -15
3y = 9

Question

FAN, FAN TESTIMONIAL, AND MEDAL!!!
Choose the equivalent system of linear equations that will produce the same solution as the one given below.

6x + 2y = -6
3x - 4y = -18

A) 12x + 4y = -12
15x = -30
B) 8x + 4y = -4
14x = -10
C) 6x - 8y = -36
-6y = -42
D) 6x - y = -15
3y = 9

mertsj · Answer

The first two choices show that y has been eliminated.  Eliminate y and see if you get one of those answers.
If not, move on to the last choices where x has been eliminated and see which one of those is correct.

anonymous · Answer

A and D are correct when I plug the values back in, so it must be one of those. @Mertsj

mertsj · Answer

1.  Multiply the first equation by 2
2.  Add the result to the second equation.
3.  Now you have eliminated y.  
4.  Is the result either choice A or choice B???

anonymous · Answer

It's A, right? @Mertsj

mertsj · Answer

yes

anonymous · Answer

Thank you! You were right, I just submitted the test and got 100%!!!