Question

20. 5x-y-7=0, x-y+1 = 0.
21. 2x - 3y = 12, x + 3y = 6.
plz solve this two equation. ​

Answer 1

20) 5x-y =7-----------------------(1)

x-y=-1-----------------------------(2)

solving eq (1) and (2)

5x-y=7

x-y=-1

-. +=+

----------------

4x=8

x=2

then you will find the value of y by putting value of x in any eq.

21). 2x -3y=12

x+3y =6

after solving both eq. we get

3x=18

x=6

again you put vslur of x in any eq. you got value of y

Hope it will help you

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