Given equations a and b as 2/5x+y=12 and 5/2y-x=6 respectively which expression will eliminate the variable x a) 5/2a+2/5b b)5/2a-b c) a+ 2/5b d ) 5/2a-2/5b e) 25/10a+6/10b

C)

Step-by-step explanation:

Given Equations:

A)

B)

In order to eliminate we need to multiply to equation B and add it to A.

Multiplying to B.

⇒

⇒

⇒

Adding it equation A.

+

We get

Thus is eliminated.

So, the expression used to eliminate is:

true

step-by-step explanation: