Question

if १२x + १३y = २९ and १३x +१२ y=२१ then x-y=???



(१) -८ (२)८ (३)५० (४)-५०



please explain ​

Answer 1

Answer:

Option (१)

Step-by-step explanation:

Given :-

१२x + १३y = २९

and १३x +१२ y=२१

To find :-

Find the value of x-y ?

Solution:-

Given pair of linear equations in two variables are:

१२x + १३y = २९ ---------------(1)

१३x +१२ y=२१ ----------------(2)

On subtracting equation (1) from the equation (2) then

(2)-(1)=>

१३x +१२ y=२१

१२x + १३y = २९

(-) (-) (-)

____________

१ x - १ y = -८

____________

=> x - y = -८

Therefore x - y = -८

[ Given pair of linear equations in two variables are:

22x + 23y = 29 ---------------(1)

23x +22y= 21 ----------------(2)

On subtracting equation (1) from the equation (2) then

(2)-(1)=>

23x +22y= 21

22x + 23y = 29

(-) (-) (-)

____________

1x -1y = -8

____________

=> x - y = -8

Therefore x - y = -8]

Answer:-

The value of x - y for the given problem is -८ = (-8)