Respuesta :

well to eliminate x you will need to make the positive value of x in one equal the negative value in the other. 
hence you can either multiply A by 5/2 or B by 2/5 which brings you to either 2 or 3, but as x is negative in B already, you add. resulting in the answer being the 3rd one down (i think)
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Answer:

To get rid of the x you will need to make the positive value of x in one equal the negative value in the other number.

multiply A by 5/2 or B by 2/5 which is either 2 or 3, but x is negative already, so you add. And the answer is C

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