Question

Given equations A and B as 2/5x+y=12 and 5/2y-x=6 , respectively, which expression will eliminate the variable x?

Answer 1

Hello,

the answer is 5/2*A+B

Answer 2

`(2)/(5)` × B + A

Explanation:

Given equations are
`(2)/(5)`x + y = 12 ---------(A)

and equation
`(5)/(2)`y - x = 6 -------------(B)

To eliminate the variable x we will multiply equation A by
`(5)/(2)`

and add it to equation B.

In other words, the expression that we will adopt to eliminate the variable x will be
`(2)/(5)` × B + A