Question

What is the result of subtracting the second equation from the first?

2x+7y
2x−5y
​

=−8
=−1
​

Answer 1

The result of subtracting the second equation from the first

We Get,

`y=(-7)/(12)`

Explanation:

Given:

2x+7y = -8 .................Equation( 1 )

2x−5y = -1 .................Equation( 2 )

To Find:

What is the result of subtracting the second equation from the first

i.e Equation( 1 ) - Equation( 2 ) = ?

Solution:

Subtracting the second equation from the first means

Equation( 1 ) - Equation( 2 )

( 2x + 7y ) - ( 2x−5y ) = -8 - ( -1 )

∴
`2x + 7y -2x+5y=-8+1\\\\2x-2x+7y+5y=-7\\0 +12y=-7\\\\y=(-7)/(12)`

We Get,

`y=(-7)/(12)`