Question

x+y=10,x-y=20hindi math bihar board ​

Answer 1

Answer:

X = 15 Y = - 5

Step-by-step explanation:

X + Y = 10 ------ ( 1 )

X - Y = 20 ------ ( 2 )

ADDING EQUATION 1 AND 2

X + Y = 10

+ X - Y = 20

2X = 30

X = 30

2

X = 15

PUTTING X VALUE IS EQUATION ( 2 )

X - Y = 20

15 - Y = 20

- Y = 20 - 15

- Y = 5

Y = - 5

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