Question

if 2x+y =2x-y =√8 then value of y is ​

Answer 1

Answer:

2x+y=√8

-2x+y=-√8

2y=0

y=0

$\huge \bold{y = 0}$

Answer 2

Answer:

0

Step-by-step explanation:

Concept= Solution of equations.

Given= Two equations and their value.

To Find= The value of unknown variable.

Explanation=

We have been the question as 2x+y =2x-y =√8 then value of y is.

So we have equations as,

2x + y = √8  ......(i)

2x - y = √8 ........(ii)

These types of equations are solve simultaneously as their are two equations and two unknown variable.

So in this first we will multiply the equation (ii) by -1.

We will get, -1(2x - y)=-1√8

-2x + y = -√8  ......(iii)

Now to find y we can easily eliminate the variable x,

So we now add equation (i) and (iii)

(i) + (iii)

2x + y =  √8

-2x + y = -√8

=> 0 + 2y =0

=> 2y=0

=> y=0

hence we find the value of y as 0.

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