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11x + 15y +23 = 0 …

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11x + 15y +23 = 0 7x + 2y - 20 = 0

Posted by Sonu Siddique 5 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Yogita Ingle 5 years, 11 months ago

11x+15y+23=0
11x+15y= -23. (equ.1st)

7x-2y-20=0
7x-2y=20. (equ.2nd)

11x+15y=-23
7x-2y = 20

multiply by (2) in equ. 1st &( 15) in equ. 2nd we get.

22x+30y= -46. ( equ. 3rd)
105x-30y= 300. (equ. 4th)
_____________
127x=254

X=254/127
X = 2.

put the value of X in equ. 2nd

7x-2y=20
7(2)-2y =20. (X=2)
14-2y =20
-2y=20-14
-2y= 6
y= 6/-2
y=-3.

Your answer => X = 2 , Y= -3.

1Thank You

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Posted by Kanika . 1 month, 1 week ago

CBSE > Class 10 > Mathematics